after removing the kbc ic, the laptop actually shorts 3v & 5v when connected to an adapter or battery.?
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A1706 with some liquid damage. I've cleaned it but PPBUS_G3H will short to ground when its connected to the charger.
Watch a short clip of whats happening here:
https://youtu.be/HcegjB4fWVM
Is there a problem with PPBUS_G3H and what should I look for? -
I'd like to start out by thanking this forum for providing the info to be able to repair my 15 year old CP1500AVRLCD UPS. Here is all the info I gathered during my trouble-shooting and re-capping.
Like clockwork, I've had to replace the SLA batteries every 4 years. It was about that time and the UPS was acting like it needed new batteries... randomly shutting off with AC present, not being able to charge fully, and poor runtime when AC was removed. So, I replaced the batteries but noticed that it was not charging properly.
I decided to verify that the batteries were... -
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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Previous owner says this unit powers on and sometime has an image and sometimes not. They attempted to replace the main board but with no success.
TV came with the replacement mainboard as well as the original.
When the TV turns on there is no image or sound. No response to the remote or toggle button other than the power button. The power supply's relay was clipping here and there. It did that for several seconds even after I removed the mains. I did this even with no other boards connected (only the backlight was connected at the time). Backlight looks fine but... -
Hello!
This is my first post for help, and I am quite newer to board repair, so bear with me.
I have this board here (LA-E671P), with no power, and doesn't charge. No lights come on when plugged in.
After visual inspection of the board, U22 is obviously blown up. This is the for backlight, and there is no shorts present after removing the chip and replacing.
There is 3 USB C ports to power this board, USB 1 gives 20V, while 2 and 3 only give 5V.
My observations using USB 1 at 20V (0.075A draw on Ammeter, slowly drops from 0.136A)...
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