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Rainbow_Chameleon
New Member
Last Activity: 01-25-2025, 05:15 PM
Joined: 09-10-2024
Location: Ravensburg, Baden-Württemberg
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  • Rainbow_Chameleon
    started a topic Searching Datasheet for AM113 IC by O2MICRO
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

    Searching Datasheet for AM113 IC by O2MICRO

    I got a dead HD6950 on Ebay to try my luck and repair it. There were a few broken off capacitors that I already replaced.
    Measuring the PCI-E lanes I got somewhat weird measurements, the gpu might or might not be dead.

    If I plug the GPU in, the core heats up and I also get VCore but on two inductors that measure 16 and 60 Ohms respectively (Memory and PEX I guess) there is no voltage.
    On one of the two buck-controllers (APW7165) the enable pin is pulled to GND and the other controller I just cannot find a datasheet for.

    So if anyone has a datasheet or at least...
    See more | Go to post
  • Rainbow_Chameleon
    started a topic Troubleshooting XFX RX560
    in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

    Troubleshooting XFX RX560

    So I got my hands on a broken RX560.

    After measuring the basic resistances and voltages everything appears to be fine, the core itself also heats up and the pc boots up (beep is there, on igpu mode everything runs fine).
    But I just do not get any display output. After looking and touching around a bit I recognized the VRM controller chip (ON NCP81022) and the corresponding low side MOSFETs for the Vcore (uPI M3098M) get very hot to the touch.

    Now I dont have the time anymore to check for any short circuits by injecting voltage in the circuit and checking if anything...
    2 Photos
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  • Rainbow_Chameleon
    replied to Graphics card Schematics and Boardviews
    in BIOS & Schematic Requests!
    Hi, I just recenty started to get into gpu repair so I got a few cheap spares which I could not find any board views for:

    -Nvidia GeForce GT220
    -Palit GTX 460
    -XFX RX 560
    -Sapphire R9 390X
    -Gigabyte GTX 460 (GV-N460OC-1GI)
    -Acer? GTX 560Ti
    -XFX HD 6950
    -EVGA GTX 760
    -MSI GTX 760 Twin Frozr (N760 TF)
    -EVGA GTX 780Ti
    -XFX RX 590
    -XFX R7950
    -ASUS R9 290

    I guess I know why I got them for rather cheap now...
    Any pictures would be appreciated as...
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