QGAH02095 and QGAH02098 Value

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  • narf
    Epson EB-U42 projector / Caps with 0.7 ohms ?!
    by narf
    hi all,

    first of all: i'm a (motivated) newbie, so please forgive me any stupid question i may or may not ask

    i'm currently repairing a projector: Epson EB-U42 that doesn't start (no lights, nothing).

    what i've found so far:
    - the PSU does its job and supplies 12V to the mainboard via the connector.
    - shortly thereafter, there is a mosfet (TS420-600B) where i can test 12V on the one side (in the data sheet this side is called Anode), Gate 0V, Kathode shorted to ground
    - not far away, there's the first cap with a resistance of 0.7 ohms....
    07-02-2024, 03:53 PM
  • reessi
    Acer Alienware Nitro 5 (GH51G LA-L181P Rev: 1C) & Dell Alienware M15 (GDP50 LA-k452P Rev:1) - Both Shorted PCH (SRKMA)!
    by reessi
    Hello:

    I have both these laptops that appeared to have the same fault so I thought I would have a go at replacing the PCH as something to learn, they both are using the same PCH.


    I started on the ACER:

    Up on connecting power no signs of life but current is consumed from the bench power supply and the PCH is hot.
    All the caps on the top of the PCH are showing 0 ohms and the 3.3v rail is shorted.

    I followed the videos from Sorin, Electronics Repair School on Youtube heating from the bottom to install. I practised on around 10 scrap...
    10-29-2024, 11:31 AM
  • AustinCER
    In Search of Schematic/Boardview for Lenovo Ideapad Flex 5 14ALC7
    by AustinCER
    Hello,

    I am in search of a schematic or boardview for Lenovo Ideapad Flex 5 14ALC7.
    No power and no charging LED with AC Adapter connected. AC Adapter is functioning at 19V, and also tried another Lenovo AC Adapter -- no charging LED still.

    There is an active 19V from the USB-C port to the motherboard with AC Adapter connected, so the port is also fine. I am assuming there is a short on one of the power rails, but don't know where to start looking.
    Any insight, schematic or boardview would be greatly appreciated.

    Model: Lenovo Ideapad Flex 5 14ALC7...
    11-04-2025, 03:49 PM
  • Baste
    What are the pro's and cons of replacing a 1/4 with a 1/2 resistor same ohms?
    by Baste
    Hello,
    As the title says. I bought a cheap Asus ROG Strix 750-watt PSU, which was posted as defective. Cables are complete, and the entire PSU is in good condition, of course, aside from being faulty. Long story short, upon checking, there is no +5VSB. Looking at the components, I found a blown resistor. I swear, looking at the bands, the color is pink, pink, gold, gold. I dunno if I'm color blind or this is the way resistors are coded.

    Please help, did I decode it correctly at 2.2 ohms (red, red, gold, gold), or what could a pink, pink, gold gold value be? I bought a...
    10-30-2025, 11:51 PM
  • sevaz
    huawei matebook d16 quanta h9r da0h9rmbaf0 schematic or boardview search
    by sevaz
    I search the boardview or schematic for Quanta H9R DA0H9RMBAF0 Rev F BoardView
    pls
    08-05-2025, 01:13 PM
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