Customer brought in computer for data recovery, was successful in retrieving data however it would not let us reinstall or load an operating system. Did a DFU RESTORE and that was successful, computer launches and goes into internet recovery, however it crashes once it hits 3/4 the way and starts over again. It did this when we tried to load recovery before the DFU restore and assumed maybe a restore would resolve this issue, sadly it does not. Removed the logic board and inspected the board and it does not have any signs of visible liquid damage or any signs of burns or faulty chip areas. Would like to know where to look or what to repair to get this board to resolve itself.
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Apple MacBook Pro 13" A2289 820-01987 Schematic & Board View
820-01987...10-05-2024, 02:48 PM -
Hi everyone,
I am trying to fix a samsung washinmachine power supply main board.
I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
The power supply board reference is the following: DC41-00189a
I have followed one thread (https://www.badcaps.net/forum/troubl...ingmachine-rel... -
Hi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue.... -
Good day all,
I got a 2007 MacBook from a friend. The fan was not working so it was overheating.
Once the fan was swapped, I installed an OS and it worked fine.
The board had quite a few corroded spots so I removed it, touched those spots with a soldering iron, washed the board in PCB cleaning fluid (I've done that many times), rinsed it with distilled water, dried it etc.
Unfortunately it doesn't work anymore. It does turn on, fan spins, power LED turns on. But no picture.
If I see that right, I have missed VCORE on L7100 (page 59).... -
Originally the tv arrived with dimmed backlights (not failed leds) but everything else worked ok. Adjusting backlight in menu did nothing but voltage changed on dimming control pins,
0% p_dim at 1.65v and a_dim at 1v
50% p_dim at 3.3v and a_dim at 1.65v
100% p_dim at 3.3v and a_dim at 2.88v
Changed backlight leds anyway as always like to have complete peace of mind they wont fail shortly after selling the tv. No change as expected!
Leds are 2 rows of 15 6v leds.
On inspection of the power board found diode MBR3200 shorted so replaced with...
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