[G3 Q&A, Help & Troubleshooting] c0balt08:
Greetings Everyone,

I need help regarding my hardbricked LG F460L. As of right now it is in DEADBOOT (The screen won't turn on even if I plug it in) So, I can't boot into RECOVERY, DOWNLOAD MODE, or FASTBOOT. However, when I connect my phone to my Win 7 64-bit PC, it is detected as QHSUSB_BULK.

This nightmare happened because I flashed a D855 modem.iso to my F460L, I accidentally flashed the incorrect modem.iso in TWRP and i've been screwed since then.

After reading and scouring through every LG F460L/K/S Cat 6 Unbricking threads in XDA, I have found three methods:

https://xdaforums.com/lg-g3/general/fix-unbrick-lg-g3-stuck-qualcomm-hs-usb-t2933853

- I have installed the QUALCOMM driver, my phone is now detected as Qualcomm QDLoader 9008. This is in accordance to the BoardDiag method. Using willcracker's boarddiag program, I connected my phone to my pc and clicked start HOWEVER I always get the device not found in dload trying flash programmer error after 2 minutes. The AP Chipset I chose is B2 since there is no MSM8084 or APQ8084 chipset for the Cat 6 in the program

If anyone has a working BoardDiag program that supports the Cat 6, please do post a link in the comments or PM me if you so prefer.

= ~FAILED~

https://xdaforums.com/lg-g3/general/unbrick-debrick-f460-boot-security-t3352382

- I tried to boot through an external Micro SD card by flashing a "debrick.img" to the SD card. There were 5 debrick images listed in the guide, however, all of its download links are down (220, 200, 180, 160, and 140 are all down)

Thanks to the efforts of other users, I was able to download a debrick image file for the F460. Upon mounting the flashed Micro SD card, my screen turns on and I can enter download mode BUT it was of no use since I was stuck in an eternal "Secure Booting Error!" bootloop.

If anyone has a working link to the 5 debrick images for the F460, please share.

= ~FAILED~

https://xdaforums.com/verizon-lg-g3/general/fix-unbrick-hard-bricked-lg-g3-vs985-t3467067

-Finally, there is the Wire Trick (Test Point/Shorting Points) method, this method carries a risk of DAMAGING HARDWARE since you can fry your mobo if you're careless.

Since my phone was already detected as Quallcomm QDLoader 9008, I skipped this method, but beacuse the first method is not working for me, I wanted to get back to this.

I was actually desperate enough to attempt this, however, upon reading the warnings and disclaimers, I had to think twice about it. The trick was to short a point near/beside the processor and short it to ground. It is relatively simple and easy (For the International versions) but since I have an F460 Cat 6, my board is SIGNIFICANTLY different from the mobos of the International/European versions.. Images and diagrams online, looks different to an F460L mobo. Can't risk frying my phone!

Since there is no information/images/guides regarding how to short an F460 Cat 6, I put out this method for later study.

If anyone can point me where to short these pins or help me find the correct pins, I would appreciate it.

= ~FAILED~

http://cafe.naver.com/develoid/562849

:crying: I am desperate because support for the Cat 6 seems to be very poor, and the Develoid Cat 6 forum in Cafe.Naver is apparently region-locked, only allowing Koreans. I can't seem to register an account since it requires an I-PIN or a Korean phone number. :(

Please Help Me!!!!!!!!!!!!!!!!!!!!!! :eek:

If anyone can provide me with other methods (except paying for overpriced JTAG repairs :p ) I will really appreciate it!

and Thanks everyone! :D