Hello, I have a da0h9bmbcd0 card which had a liquid spill, there was an area in which corrosion damaged the power rails but it is almost undetectable to where they are connected, I looked for the schematic diagram of the equipment but it is not available so if you can help me I would appreciate help knowing which integrated part is the one that had the damage.
da0h9bmbcd0 ic help
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Search for ‘ML= Richtek'
https://www.richtek.com/assets/produ...S6543AB-04.pdf
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https://a.aliexpress.com/_mtXC0oILast edited by mon2; 05-06-2024, 07:03 PM.
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by B2L_RepairsI got a huawei D15 that came in for no power repair. Device charges , charging led flashedms but doesn't turn on. I found corrosion on an IC (ic name is BDJCY1...I can't find out much info about it online). I removed this ic and two pads are corroded but they can be repaired. To my knowledge inductors never short to ground (i might be wrong and please those that are more knowledgeable than me can correct me). I found few inductors short to ground when my multimeter is in beep mode ,indicating a short in the line of those inductors...but I don't know how to go about to find the shorted component...1 Photo
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by TraptorHi Guys,
I have a Logitech Z506 with some problem.
The main problem was the front right and subwoofer gave a hard noise.
After the disassemble I found many corrosion on the mainboard as you can see on the pictures.
I removed the corrosions and the noise disappeared but the sound too.
I think some parts is damaged because of the corrosion.
I searched a lot on the internet but I cant find correct schematic for this pcb, so I dont know what is the correct values of the damaged parts.
But I found same good pictures of this board.
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Channel: Troubleshooting Audio Equipment
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by AskicHello guys,
I'm learning about logic board (motherboards) repairs. I don't do repairs professionally, but I manage from time to time to repair something for my family and friends.
What caught my attention is this visual inspection guide written by Louis Rossmann. It seems that corosion on probe points on the motherboard can "kill" Macbook. https://wiki2.rossmanngroup.com/inde...ual_inspection
I wonder how corrosion cause this. If there is a track that has a probe point made on it and corrosion is build up on that place, does this means... -
by ronaldopdiasHi All.
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The LAS was corroded, but I have tested it on an A2681 (M2) and it functions fine. Anyway, I ordered a new one and replaced it and calibrated it with Apple.
I have checked the main voltages going to the daughterboard and they are present. Diode mode reading on the LAS line which goes direct to the SoC is also correct, no short.
So then I replaced the daughterboard, and... -
by ugamazingWorking on an 820-02918 board that had a minor liquid spill, but it was directly to the ISL/U5200. Essentially the entire area had to be replaced due to corrosion. Got it all cleaned up and everything looks good and checks out, but we're hitting a cycling PPBUS issue now. PPBUS_AON cycles quickly from ~9v-12v, indefinitely.
Knowing this is typically a sign of a possible short on a lower rail, we checked all around and found no obvious damage or shorts. We have VERY LIMITED parts for this model (exactly 1 single U5200 chip), but I suspect it will end up being a continuity issue or... - Loading...
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