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Re: HP DV6 issue ?
[QUOTE=jasko_jacker;909599]I think the problem is after the power button is pushed, before the
other voltages we still control the voltages referred to the video chip, check PL37 1.8V_VGA as always in diode and resistance mode.[/QUOTE
What value for Ohm and diode on it to GND ? thanksComment
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Re: HP DV6 issue ?
I checked, there's a short on PL14, can it be removed ? thanksComment
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Re: HP DV6 issue ?
looks like PQ65 is faulty, AON7702Comment
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I check PPBUS_AON and there is a short present on the line, the computer shows a short when testing for short to ground, so when I inject voltage into the line, I get 0AMPS so no short is showing up. I have replaced a blown cap on this board that exploded and tested for the short and it is now removed. Any suggestions? I tested voltage at the line when the fuses are connected and I am getting 1.2 Volts at the line.
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HP Pavilion 15-CW1002UA
S/N 5CD0251CBC
P/N 7KE54EA
Hello guys!
I have a strange issue with my laptop keyboard and I'm lost trying to detect what's wrong - the KB9028Q-C or the keyboard itself.
It powers on OK and has no other issues except the following:- CAPS LOCK does not work at all
- Fn button toggles Flight Mode
- When I press 't' or '5', it produces 't5', and when I press 'y' or '6', it produces 'y6'
- (with SHIFT pressed: 't%' and 'y^' respectively)
but when I press and hold...06-27-2025, 01:10 AM -
Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.
🛠 Original Issue
The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
⚠️ New Problem: One USB-C Port Only Works in One Orientation... -
Hi all,
Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.
Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second... -
Hi all,
I have a weird issue with a GTX480 I am repairing for fun.
Originally it would crash Windows when drivers were being installed. I checked with MATS and found a faulty RAM IC. I replaced it, MATS is happy but still the installation fails to install the driver - but no more BSOD.
While testing I found something weird.
What I think is the VCORE, is completely shorted. I read 0.4 Ohm to ground. I'm aware that low resistance is normal around a GPU but I don't think 0.4 is ok?
If I check the inductors and all the mosfets,...
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