yashsingh1/xdaforums huggingface dataset:
[HD2 General] Ev0luti0n_:
Boa sorte com o teu problema.. eu comprei o meu usado no ebay, não sei como é com garantia da HTC aqui em PT. eu também tenho um, e evito fazer o que quer que seja que o faça aquecer!
[HD2 General] devnull73:
I think I have a similar issue with a HTC desire. Trying to get it repaired under warranty at the moment.

I think there is a general thread of crapulence in electronics right now, and it seems to be the soldering of these chips in compliance with EU regulations. AFAIK the victims include HTC phone, PS3, XBOX 360, any laptop with an Nvidia 8600 chip (eg, my Dell XPS1330 which I fixed with a hot air gun) etc etc etc.

What annoys me is when companies think that any design flaws are the customers fault. grrrrrrrrr.

Anyway, after HTC fail to fix my phone Im going to try a hot air gun.
[HD2 General] Kaaf:
Did the oven trick with a xbox 360 as well. I wrapped the CPU board in clothes and tin foil (for isolation of the capacitors and plastic parts) and left the CPU and GPU open. Put it in the oven for 10 minutes on 250 degrees. And seemed to work. Don't know for how long though.... i'll pray and do the same thing with my hd2 board if it stays OK

wrap it in tin foil and cotton maybe safes some other componetens.

I thought i should share
[HD2 General] metroidnemesis13:
facdemol:

Is it your experience that the EU versions fail less often then TMOUS versions? Every TMOUS version I've ever seen has been returned to HTC at least once. Check out this poll I've got going, and maybe also add your opinions. I'm trying to decide which version to buy since I figure these will be hackable for years to come.

http://xdaforums.com/showthread.php?t=1288067
[HD2 General] badboyz777:
pray this works.....

Facedemol is unresponsive?? Have sent him pm but no answer anyway I'm going to use a lighter and light it for 1min and see if that will work.praying to God it will work PLEASE WORK I BEG, will let you know what happens.
[HD2 General] motoi_bogdan:
sorry for the long delay, i will be back in a day or something similar. Have been having some health problems, i visited the forums but very briefly.

badboyz777 don't use a lighter. You have no way to regulate the heat induced at the board level. The center of the flame and the zone it targets will be hotter then the surrounding areas. The center will expand with heat more faster then the outer zones of the CPU, thus giving you a very real chance of destroying the BGA underneath or even physically breaking the chip.

I have made some other couple of discoveries based on a device recently donated to me. I'll be happy to share them once i'm feeling more well and can stand up at the computer to write a longer post.

metroidnemesis13 in my experience i found out that given some specific real life conditions, both eu and tmous can fail in the same way. For reasons i don't know as of yet, i have more troubles fixing an EU hd2 then the Tmous one. Still i can't prove one of them being more... well put together then the other.

If someone has this problem and still has the device under warranty, i strongly suggest taking the phone back to them. Please go there, yell at them, throw the phone though the window, warn them you'll be spamming their websites, do anything you thing necessary to convince them to fix it under warranty (logic board swap). Otherwise, there isn't a simple solution for this problem yet. When i see a broken hd2 now, i still can't know for sure if i'll be able to fix it, even while having some experience with these and the equipment needed to do the job.
[HD2 General] badboyz777:
Too Late, I killed my board :( because it comes on and only black screen and nothing else, and my pc doesnt detect the cpu in usb anymore

*CRY* looks like a waste of money and ill just get a new one....

sadly
[HD2 General] silkstone:
There is a trick to reviving dead video cards that i've read about. now this is only successful about 20% of the time but i was wondering if anyone else has tried it. Putting it in the oven at a really high temperature for about 5 minutes and sometimes the broken solder joint will re-attatch.

sources: http://www.techpowerup.com/forums/showthread.php?t=149654&highlight=video+card+oven

http://www.techpowerup.com/forums/showthread.php?t=141988
[HD2 General] FabyXXX:
I have a broken hd2 too, and I don't know what to do.It's not under warranty anymore so my last option is to reheat it.

So I'm wondering if facdemol can tell me where did he bought that mica foils from as I don't know where to buy them from.
[HD2 General] musashiz:
Plug the phone into a usb cable connected to a computer NOT the charging cable. I have noticed this has caused the hd2 to turn on without using power button
[HD2 General] ubejd:
im glad you are back

i just wanted to "report"

i have another hd2 with heating issues i tried fixing - cooking and now it doesnt turn on at all - it gets very hot if i connect with adapter- i will upload a pic latter.

I did the same procedure like with my first hd2.

covered main board except cpu

heated up to 250 °C same problem

i started again but this time i went up to 320 °C, like i told now phone is not powering on .

Ps: My first hd2 ( i repared ) its geving signs that heating issues is back.
[HD2 General] kompheak:
This is just my opinion... why not get a broken hd2 with a good working board for 30-40 bucks and replace it.... just swap out the board...
[HD2 General] ubejd:
you are right but where could we find one - personally i will buy wright now ( i bought one but resulted with same problem)... even if we get broken hd2 who will guarantee us that the board will work.
[HD2 General] kompheak:
Craigslist... you can check your product on the spot. Don't recommend ebay... too risky...
[HD2 General] Menjic:
Problem with electric oven is temp control which is so slow that it fluctuates 20+ degrees Celsius. So if you turn the knob to 220 it can be 200 or 250 and probably is heating and cooling between those temps, so we don't have constant 220.

1. I heated my oven to about 100 Celsius, put board in, wait 10 min, then gradually increasing temp to 240, then turned off oven and let the board cool down.

Not working, and heating as soon as I put USB to comp.

I noticed something strange and funny after this first heating I found like two bga balls fell off ??? Could not find from where, but definitely they are round ball like peaces of thin :) so maybe not bga balls but something.

As soon as I saw this I was shore that this board is trash from now on :)

But I heated it second time.

2. Heated to 100, put board in, wait 10 min, slowly increased temp to about 240 and wait for 5 min then turn off and wait for everything to cool down.

Off course board not powering up.

Another thing I noticed after this second heating is that some of contacts like oxidized or changed a color to darker, maybe I heated it too much ?

I am not sorry phone was not working in first place. It was HD2 Europe and I like it so please read to end :)

So if this helps you it is my experience.

Now, does anyone need this board as is and I do not accept returns like they say on ebay.

Chip dead 99%, half LCD connector is broken :)

I can send it by mail or fedex or some company I AM GIVING IT FOR FREE,but If shipping is too much I will check depends on where I need to send it you will pay it when it arrives to you, just sipping, board is still free :)

And does anyone have working HD2 Europe board to sell it to me ?

And what is difference between EU and TMOUS boards ? Can I put TMOUS into EU HD2 ?

My English is a little bad but you will understand it I hope :)
[HD2 General] showlyshah:
I like ur idea. But man u have done some hell job in mounting a heatsink. Why do u go for mica sheets and copper foil? All u want is to cut down some aluminum/ copper plate( with the needed dimensions of course) from. Computer heatsink or so.. then directly glue it over the CPU using thermally conducting epoxy ( Arctic alumina or Arctic silver epoxy) which are used mainly 2 mount high-power leds to heatsinks. Search EBay for epoxy . Itz between 10-20 $. It will be much more better. Actually u can find this type of epoxy is used in high performance ram( having clock speed over 2000) modules, in which heatsinks are glued to chips. I recommend using Arctic alumina as Arctic silver is costly and also electric conductve. So using it u can get the job done much more neatly.

And about mica sheet, man u can get them from any heating device like electric iron, coils, and even from mosquito repellents which works by heating a pad containing chemical over it( the same stuff. Mosquito Matt) .

send from my hd2 @ miui 1.12.2
[HD2 General] Menjic:
Heat conductive epoxy can be pretty har to remove, and as I understand problem is not in heat transfer or too much heat, problem is in bga balls.

On old video cards, you have suficient heat sink size and cooling fans and .... still you get to point where bga breaks and just heating up the chip without completly removing and reballing is not longterm solution, cards wil work after just reheating for some time but would die again shortly after. And cards that are properly cleaned of old material and reballed with new will last for ever :)

@facdemol :

Is there anny chance that you can melt factory epoxy around cpu in HD2 with some acid or some kind of solvent or ... ?
[HD2 General] motoi_bogdan:
the epoxy as a chemical compound is pretty stable - non reactive. I have access to some acids but i'm sure none will work. However if you place the board in an acid environment i'm pretty sure you'll destroy some pcb tracks or at least some of the materials used on the motherboard will react to the acid with unwanted consequences.

Like i've said on the first post, the "cooling system" WILL NOT solve the problem on it's own. It's more of a preventive measure to be applied AFTER you have successfully reheated (reballed ?!) the cpu/motherboard bga.

Regarding tmous to eu motherboard swap, the boards are different in layout an shape. You cannot fit a tmous motherboard in a eu chassis. I've tried :p
[HD2 General] showlyshah:
Epoxy!! The good bad stuff. Man do u have a soldering iron? If so u should try it carefully. I am not 100 % sure. But i have successfully removed some similar stuff from computer motherboard using the techniques.

For that u need a good soldering iron( i got GOOT 30-300W SOLDERING GUN) with a pointed tip. Heet the iron, and press the pointed tip end into the epoxy( make sure u dont harm the pcb or chip) it will tear out slowly ( hope it work. The general sense i got from my on thinking, "no general purpose epoxy even heat conducting/ heat resistant cant withstand temp above 250 degrees. I checked. It worked. ) tear the whole thing patiently. But always take double caution. Itz a easy but risky business.

send from my hd2 @ miui 1.12.2
[HD2 General] motoi_bogdan:
yep i know heating up the epoxy will help to some degree but.. it's risky business. I once had a broken board (totally dead) and i wanted to remove the cpu for my keychain cpu collection :D . So i preheated the whole board to some 220 degrees and then i removed the epoxy with a sharp metallic tip . At 220-300 degrees the epoxy will not melt but it indeed becomes more flexible. I would not, however, try to do this on a good board, since there are many small resistors around the cpu itself and the epoxy - like it or not, helps securing the chip in place - without it, let's say it would be impossible for the phone to survive to a mechanic shock without some broken bga balls, especially if the shock happened to the phone while it was hot (running intensive tasks etc).
[HD2 General] djvaliro:
Thanks for your post ! very useful - not for noobs !

.. pff i can't wait to get back home to put my tools to use, i was thinking of this solution for a long time (i have repaired over the years like u laptops and chipset replacements kinda my job) , it's like i knew but never had the time.

So you thread is very valuable to all of us especially to tech guys. Thanks a bunch.

Salutari din Fr.:cool:

Great job. Keep'it up.!
[HD2 General] Menjic:
@facdemol:

Is it possible that melting point of bga balls is different for EU and TMO models ?

If I am not mistaking EU HD2 needs a little less temp to do the job.

I don't have any precise measurement method nor do I have any proof for this, it is just a thought :confused:
[HD2 General] phaxis:
temperature C or F

for the instructions for heating with an oven, is he referring to Celsius or Fahrenheit?
[HD2 General] Whatdoyaknow:
HD2 overheating

The oven trick sounds a bit of a challenge
[HD2 General] actasci:
i was having same problem with my desire. so i made my research, i disassembled the phone and baked the underside of the motherboard at 200 celsius for about 8 minutes (btw i was out of guarantee already, so i got nothing to lose). then took out to the balcony to make it cooler and waited about 1 hour. assembled the phone again, and it's not working at all.

but it doesn't make any sense at all? baking it for 8 minutes at 200, doesn't even make the chip 120-130 celsius. i checked the connections again but nothing is wrong. so i baked the motherboard, literally :)
[HD2 General] showlyshah:
Prevention is better than cure. So glue a small heatsink(that fits inside the body) on cpu with thermal epoxy. It will help ur phone to live longer. And do less oc.
[HD2 General] Menjic:
For prevention to work people first need to know and not care for warranty.

Usually people know about overheating problem when it happens to them or someone close to them.

And everybody cares about warranty and don't want to throw a possibility to change or repair device for free if it is in warranty.

And in warranty time is usually best time to think on prevention so you see a problem.

P.S.

We should make a request to PCB manufacturers to make it socketed and / or modular like computer, they call it pocket computers so make it like real thing just smaller :D:D:D
[HD2 General] elementalfx:
Just a moment ago I was thinkin about the same thing. Personnaly I dont have overheating problem atleast not accompanied by restarting of phone but a while ago when I was playing Anomaly Warzone I put little bit of more tabasco to the cpu :) when I overclocked it and hell yes I was also the lucky guy to have a barbecue running on my HD2 :). Well I almost fried my phone.
[HD2 General] 2alive:
Hi,

Did you have any advance on the HD2 temperature problem?

Do you know if the problem happens more often with T-Mobile USA ones, thanks.
[HD2 General] showlyshah:
mine is set at 96-768, with data enabled. stayed cool, but prob happens when plugged in and using data, the charging stops when it gets hot.
[HD2 General] elesbb:
That's normal . Same thing happened to my touch pro 2 when tethering .

And boy reflowing the CPU .. sounds like I'm repairing and old hp laptop !
[HD2 General] slybunda:
is making a foil heatsink the best way out? i cant seem to get any of that copper mica stuff in the uk, unless its named differently. looks like if im to attempt this im going to need a lot of thermal paste, preferably stuff thats not electrically conductive.

also in the original post you used foil and did 12 folds, thats a lot is it not possible to get thicker foil and do less number of folds?
[HD2 General] showlyshah:
i warn u, u will mess it up.

do this, get a small piece of aluminium or copper( preferred over aluminium) plates( use those small ones from computer parts or so.), file/grind it to desired shape and size, that can fit inside the body. and when u have done enough designing, use arctic alumina/ arctic silver( 1st is non conductive to electricity) thermal epoxy, which is a glue that conducts heat way better than thermal compounds, (use ebay to buy it) , spread little over cpu and heatsink u made, press them together, let it for few hrs to set. done.( ones u have glued them, u cant seperate them, the glue is that strong.)
[HD2 General] showlyshah:
so is that a symptom of future damage????
[HD2 General] anhyeuemmaimai:
Phone still works fine. I believe that I resolved the issue when I replaced the SD card. I recently hard reset my device and reloaded everything that I use and have had ZERO issues Phone is now 1.5 years old
[HD2 General] slybunda:
how big a piece of copper or aluminium am i going to need to prevent overheat issues, those pics show that there is not much space for fitting a heatsink inside.

edit: i just remembered that i can easily get copper or aluminium fins off an old cpu heatsink i have so that means i got plenty of parts available.

actually i think i can understand why the cpu is overheating its the rf shield covering it. it makes the cpu behave as if its in an oven, localised temps inside the rf shield will become much higher over time inside the phone. a simpler mod can be done here to deal with the issue, but i will have to wait till i get a hold of a hd2 to start experimenting with it.
[HD2 General] motoi_bogdan:
the "heatsink" mood is useful to prevent cpu soldering failure, not to fix it once it occurs. I usually make such a mood after i reheat the cpu and test the phone.

At first i was thinking it's a simple high temperature problem (ex. cpu must not exceed 50 degrees celsius) so i made the heatsink mood. It ameliorated the problem but did not effectively solve it. Later on, i've reheated the phone, only this had effectively fixed the problem. I left the heatsink on the cpu because i was concerned that without any means to dissipate heat the cpu soldering can fail again after some time. The role of the heatsink is NOT TO LOWER THE CPU TEMPERATURE, BUT TO SPREAD IT OVER A GREATER AREA. The cpu fails because it is very hot, the surrounding pcb near it is rather cool, the soldering thus expands at a greater rate then that of the surrounding materials. The 50 or so, degrees celsius that this chip can output ar not the real problem (it can work just fine even at 70-80 degrees - according to datasheets). The soldering and the pcb design are more of a trouble here.
[HD2 General] slybunda:
yes if i do the mod its going to be done on a new hd2 which has not had any previous overheat issues. so the mod should hopefully keep it safe for long time.
[HD2 General] showlyshah:
yep, i wont solve the current problem, well it can prevent one in future. the rf sheild cant be removed that simply, since removing it can cause interference and can cause problems with cpu.

well i recomend to remove the thermal foil (that one which is used by htc over the cpu compartment), and replace it with a copper heatsink. or remove every thing over the cpu, glue in a heatsink directly over cpu( can use any size, that fits inside the shell). done.

well i never had a thermal problem untill now, coz i take too much caution about keeping my phone cool. so i never opened it. well now i am planning to open it cox i want to solve that "heat issue" and "charging stop" problem by heat sinking the power control chip. ( i want to check it, if it helps).

so my doubt is how u guys opens the device?? is it that air plunger method u use to pull out the screen or smthing else?
[HD2 General] gpkumaran:
My htc desire has a somewhat different problem.. It reboots after switching on mobile data(not wifi). Can a similar solution help in a HTC DESIRE? ?
[HD2 General] showlyshah:
it,seemz more lik a software problem. try another kernal,rom and radio
[HD2 General] gpkumaran:
no brother... It's definitely due to overheating(although it doesn't get too much hot)..

From what i've found out,

1.It is reduced with using HAVS kernel with undervolting(while using svs kernel, it just reboots but while using havs kernel it just hangs up requiring a battery pull)..

2.And it's reduced with underclocking.. But not completely solved by either of these..

One thing which is different from the problems mentioned by other users is that it gets a lot more time to reboot while browsing through wifi(with 2g/3g data off) but reboots almost immediately with Data on.. Pls help bro..
[HD2 General] sonixtra:
Hi,

As I have the same problem with my HD2, I just would like if the use of a soldering flux and a Heat Gun could be a good way to enhance the soldering state of the CPU. Because, the CPU overheating could be a soldering problem. So,may be, if we are able to enhance the solder of the chipset, maybe it could be possible to enhance the conductivity between the pcb and the CPU ...

A friend of mine use this method on a Game console and the result was really impressive ...

So, Add soldering flux on the pcb and CPU pins and overheating the pcb with the Heat Gun to activate the soldering flux between the solders and the pins ...

May be a way, but I don't know how to disassemble the HD2 :(

If someone try this method, please post a feedback :)

....
[HD2 General] tobiascrystal:
Nope, will not work, It is a surface mount chip.
[HD2 General] vietnameseJames:
hd2

Is there a video of this?
[HD2 General] T-Macgnolia:
You know this should have been stickied a long time ago.
[HD2 General] melmoo:
So I was getting the fatal hit 1 error on my HD2 when trying to reboot, as long as I left it off for about 15 minutes it would boot okay, but invariably it would lock up when using it. I tried the oven method that I used previously on my iPhone 3g - 385 degrees for 7 minutes, with the motherboard raised up off a cookie sheet with foil triangles. I put the phone back together and there was no improvement.

After perusing eBay and seeing that a new HD2 motherboard would cost me over a hundred bucks, I decided to try to reflow it in the over again since I had nothing to lose. This time I set the oven for 400 degrees and left it in for 12 minutes. Put the phone back together and voila! No more booting issues, and now I've been using it for a day and it's been stable.

Lead free solder is great for the environment, but bad for the longevity of electronics. I've now baked more electronics in my oven than I have ever used it for food :)
[HD2 General] Pierrot Lunaire:
Hey melmoo, is your HD2 still functioning good enough?

My phone is really annoying me. It freezes a lot.

Now that it's summer over here it's becoming even worse...

Can you explain how you did the oven reflow exactly? And isn't there a risk of burning electronics when heating them that hot?
[HD2 General] melmoo:
It's been several days and my phone had been running fine, no instability. I flashed a nand ICS build and it's been totally stable. I basically followed the same procedure as in this video for the iPhone 3g:

http://www.youtube.com/watch?v=l1azZWWkmSg

Take apart the phone, remove the motherboard, make little triangular columns out of foil and balance the motherboard on a couple of them on a cookie sheet. I'd recommend trying the lower temperature/time first and see if that helps, if not then 400 degrees (fahrenheit, not celsius) and 12 minutes worked for me. Don't remove the motherboard from the oven after the time is up, turn off the oven, open the oven door, and let it cool down for 30-60 minutes.

Baking printed circuit boards is part of the assembly process. I used to work in electronics manufacturing and am very familiar with the process, google "reflow oven" if you want to learn more.

Good luck, I hope it works out for you.
[HD2 General] Pierrot Lunaire:
Well, I think I fried the phone...

It doesn't work anymore :(
[HD2 General] melmoo:
Are you sure you put it back together properly? How long did you bake it for?
[HD2 General] Pierrot Lunaire:
I gave it 12 minutes like you did on 400 F. Now I tried to re-open it to check the connectors and I rushed it a bit and destroyed one of the cables... baah...

Well... time to get a new phone...
[HD2 General] pmankar:
my device does not turn on and the led doesn't give any sign but before it used to have the thermal problem should i do the same instructions will it work