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  • kotel studios
    Intel D865PERL - no Vcore after replacing MOSFETs and MOSFET drivers
    by kotel studios
    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...
    04-22-2025, 05:08 AM
  • DrDos
    kenwood kr-6030 Mosfets?????
    by DrDos
    Hello everyone, I have decided to try and replace the mosfets in my power amp (the one with relay and left and right sides) on my kenwood kr-6030. I'm trying to get the A side of my speakers working. I have replaced all the caps in the power board and I thought why not change the mosfets. They seem to be working since I have great music coming out of the B side speakers and since I am not an electronic guru (but I am learning) I don't want to make any mistakes. The mosfets I have are listed A913 so I guess 2sa913 and 2sc1913. Can't really find those in mouser or digikey at least with the info...
    09-20-2025, 04:42 PM
  • NanoTesting
    Lenovo Ideapad 15IIL05, turns on and off with charger BUT works by injecting 20v after main mosfets
    by NanoTesting
    I got a 15-IIL05 that failed to turn on BUT IT DID TRY TO TURN ON and then turned off after 30+- seconds, i disassembled it and found a screw loose inside the case.
    With charger it turns on, fan spins but gives no image.
    Tested main mosfets no short, tested 3.3v,5v,DRAM, CPU etc and they were present.
    Reflashed BIOS, same problem.
    Replaced both main mosfets.
    Checked main mosfets again and i noticed that they closed once the laptop shut down, so i decided to bypass them and used a bench PSU to check how much power the laptop was drawing while trying to turn on, 20v@3A,...
    10-30-2024, 10:48 PM
  • DynaxSC
    GIGABYTE X299 AORUS ULTRA GAMING - SATA PORTS 4-7 NOT WORKING ???
    by DynaxSC
    Hi,

    I have the above mentioned bord after repair, which was related to a lot of missing smd devices on the back of the board.
    There were almost 20 devices missing, caps, resistors and some diodes/mosfets.
    The board is generally working now, all PCIe ports are working, Windows installs normally.

    However I have a problem with SATA ports 4-7 (the board has 8 SATA ports) - disks are not beeing recognized by the BIOS neither by Windows (which is usually normal in case BIOS does not recognize them).
    The SATA 4-7 driver network is quite simple chipset<->buffers/drivers<->SATA...
    03-10-2025, 12:27 PM
  • BlackScreen_22
    Harman Kardon sub TS11 (ds15 amplifer) blows fuse and mosfets
    by BlackScreen_22
    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
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