Repairing a faulty laptop LCD panel - Page 1
Forum section: electronics / repair

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 03, 2018, 03:43:03 pm
content: I know this may sound silly but I would like to try fixing a laptop LCD panel. The panel is extremely rare HV121P01-100. It is so rare that our Chinese friends sellswhatever crapinstead and put even enormous effort into counterfeiting it.Mine is genuine which came with the x60t laptop from ebay. However, there is probably a loose contact and the panel is touchy. When I apply pressure on various edges, it works. It even worked most of time in the original x60t laptop. Sometimes, i just needed to knock on the edge. However, when I removed it from he laptop, it shows horizontal lines and nothing is practically readable.Similar to this video:https://youtu.be/AourgwZXA50I verified that cable between the LCD and the motherboard is OK. (two laptops, two cables).Does anyone have experience with debugging such failure? I know that I will need to take it apart, it is risky and chances are low, but I have nothing to lose, except time.Thanks for any hint.PS: Picture comes from alibaba and is for illustration only.

author: amyk
author_rank: Super Contributor
timestamp: September 03, 2018, 05:18:48 pm
content: This is a problem with the bonds onto the glass or the driver ICs. The tolerances are extremely fine so you won't be able to just remove and reattach, but the application of heat and pressure may (temporarily) fix it.

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 04, 2018, 07:07:25 am
content: Hmm, this does not sound very optimistic. What kind of heat and pressure we're talking here about? Would you have a guesstimate?

author: CJay
author_rank: Super Contributor
timestamp: September 04, 2018, 01:29:43 pm
content: If it's that rare and difficult to replace then don't even attempt it, find a specialist, there are companies which make the equipment for reworking those connections and there are repair companies who buy it.I have no idea how much they charge or if they'd even speak to you but if they're willing then it will be a lot better if they don't have to 'un fix' a bodged up panel.If they won't speak to you, then have a read of the links below and see if you can work out how to do it.https://www.google.com/search?num=30&client=firefox-b-ab&ei=LYiOW72aO8XGgAb6ipe4Cw&q=bonded+lcd+ic+replacement&oq=bonded+lcd+ic+rep&gs_l=psy-ab.3.0.33i22i29i30k1l2.29044.32590.0.36012.17.17.0.0.0.0.155.1486.14j3.17.0....0...1c.1.64.psy-ab..0.15.1324...0j0i67k1j0i131k1j35i39k1j0i131i67k1j0i22i30k1.0.4V703bba6WQ

author: Rasz
author_rank: Super Contributor
timestamp: September 04, 2018, 10:24:58 pm
content: Quote from: Warhawk on September 04, 2018, 07:07:25 amits not an exact science, most likely you have a fault in the glass part of the displayhttp://www.amadamiyachi.com/glossary/glossacfbondingThis is how you could attempt to fix itpretty much nobody (except desperate people in china/india) repairs this. Its like alloy wheels repair, you can do it for a living if you live in Belarus/Russia/India,https://www.youtube.com/channel/UC_HZvxzC_PWvRKoFznYOfYw/videos?disable_polymer=1, but it wont fly in the west.Quote from: CJay on September 04, 2018, 01:29:43 pmits $100-200 "rare", so not very much, certainly not enough for rebonding rework people to even reply in English (maybe Chinese)

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 28, 2018, 09:31:25 am
content: Just for the record. I failed

author: drussell
author_rank: Super Contributor
timestamp: September 28, 2018, 02:30:03 pm
content: To be able to do tab bonds properly, you need a rig like this:People have successfully build home-brew versions when they have access to a large enough number of panels with defective TAB bonds to make it practical and economic.It is virtually pointless to attempt to do it manually for a single panel.If you have a rare and expensive panel made of unobtanium that has bad TAB bonds, simply send it to one of the many repair facilities that has the proper equipment.