Top part of screen has big black bar and from middle on down the information like from the OSD is rolling continously toward the bottom.I've never seen this so it will be worth the $20 I gave for it to learn what causes this.I'm thinking it's probably the main board or T-con or could it be the panel since it affects the OSD?
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Dear Friends,
I have issue with dell latitude 7240 in which Laptop hdd led is continously blinking. Please help03-10-2022, 02:58 AM -
Hi guys
So after best part of a year doing other stuff, I'm back to master this BGA reworking, 2nd time lucky I hope
So I thought the best place to start was with the steps that were giving me problems last time.
With this type of reballing jig and stencils:
https://www.aliexpress.com/item/3303...archweb201603_
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hello i bought a faulty radeon r9 290 (black screen) to learn to fix gpu's, when it arrived i mesured resistances on 3.3 v and 12v both on the pcie connector and cables i have no idea on how to recognize 1.8v pex and 5v but i checked all inductors and none had a dead short only one was 55 or 140 ohms i don't really remember and i assumed it was memory i installed it on the pc and it delivered no image, not even a backlight so i installed it as a secondary graphics card using the igpu as primary, both device manager and gpu-z only showed the igpu so i assumed it was acutally a no detect even tough... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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I bought a DELL Precision 3660 Tower Workstation from a second-hand seller. After bringing it home, I found out it was actually a testing unit. The BIOS cannot be upgraded (only the ME and PD2 sections are upgradable), and there are test messages displayed during boot, which really affects the user experience.
Upon inspecting the motherboard, I noticed that the BIOS is composed of two chips: one 8-pin 16MB chip and one 16-pin 32MB chip.
I acquired two new chips from another source containing the official BIOS version, but after installing them, I found that none of the...