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Re: LA-C501P No ACDRV??
See attached. It is the same flow. Check the voltages at each of the arrow points.Attached FilesComment
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i've fixed the same problem by replacing those component , the small capacitor was shorted and the small mosfet risistance was almost zeroComment
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i've fixed same problem by change source PR311 from N1 to VINAttached FilesComment
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Interesting that this worked and thanks for sharing but the bypass should not be necessary if the mated parts are working properly. That is, the original board should function with the original wiring diagram.Comment
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Hi all, I have a Asus TUF Gaming F16 (2024) FX607J motherboard with liquid damage. The oxide on the board was removed before giving it to me. This made it more difficult to repair. Also they did not give me the power supply.
When I connect the 20 volts with the bench power supply I get 4.3 volts on the main power line. If I remove the power sensing resistor I get 20 volts on one side (first 2 mosfets are ok) and 4.3 volts on the main power line (see photo). How is this possible?? I thought the 4.3 volts was coming from the battery mosfet so I unsoldered it and tested it. It is ok too. I... -
Hi, I'll start by saying that I'm not an expert and I've reached a point where I don't know what to try/do anymore...
Starting from the beginning: I opened this subwoofer for the first time with a very strong smell of burnt electrical components, I realize that on the amplifier board there is a hole between V+ OUT and GND about the size of a finger, the damaged components were the shorted mosfets, two damaged zener diodes and two capacitors. I bought everything, I fixed the hole by cutting the pcb and putting a piece of a perforated board.
I had no problems connecting mosfets and capacitors,...08-27-2024, 12:46 PM -
Hi,
Finally got time to fix this board up.
At first it didn't give any POST codes. Turns out it was an unsupported Celeron D cpu. After dropping in an Celery 2.6gHz the CPU came out of reset with clock signal, but still no post codes. For a while it did work when I applied pressure to the ADP3168 chip, but on next reboot the MOSFETs started to burn. Then I left it as is for months.
Now I came back prepared. Replaced the bad MOSFETs and the ADPxx18k drivers. Now I don't get any MOSFETs blowing up issues anymore. But sadly, the Vcore is missing. The whole VRM isn't... -
Hi all, I have a HP 15-cb028nl (dag75ambad0 rev. d) that turns on but does not charge the battery. The laptop arrived with the super I/O (ITE IT8987E BXA) burned. After replacing the EC, it turns on but does not charge the battery. Below are the voltages on the pins of the bq24738h, with and without the battery inserted:
...WITHOUT BATTERY WITH BATTERY PIN1 (ACN)= 19.76 V PIN1 (ACN)= 19.76 V -
Hi!
Managed to get a Gainward Phantom GTX 980 in an auction for a bin with components.
No video out so I started fault finding and found a blown fuse for 3 mosfets. Started checking for shorts and found what I think is a short through all of those 3 mosfets; 0.1 ohms between "VIN" input and "VSWH" output. All mosfets in this gpu are the same ones (NCP5369) with integrated drivers and when I tried measuring the other ones through these ports they were somewhere in the kilo-ohms range.
So, could I safely assume all of these 3 mosfets are...
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