This laptop has a 3v short, client says he was replacing casing and on closing inserted LVDs cable while battery was connected. It never came on, I have tried to look for shorted cap or ic can't find one, is it possible the processor/PCH is dead?
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Re: HP 14s-cr2002tu 3V3A short to ground
my friend, you can find the solution by separating the 3V3A related connections with the schematic, it is easier to find it by looking at the schematic.
good luck -
Re: HP 14s-cr2002tu 3V3A short to ground
Yes, the possibility that CPU/PCH is now dead exists, but more often such manipulations kills the EC.Comment
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Re: HP 14s-cr2002tu 3V3A short to ground
In case of edp cable connected/disconnected with power source in, its more likely PCH thats shorted. Measure resistance to GND on 3V LDO(which is very likely shorted). You may need to inject voltage 1V/5A on 3V LDO to see if anything is hot.Comment
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hello everyone , working zebronics power suply 450 watts , 5v ,3.3v givin short to ground black wire, also in circuit at output, resistor was charred but shows right values , after removing resistors 39ohms, 51 ohms, there was no short , no continuity beeps with ground , but after replacing new resistors (now i am not switching it on) ,again short still exists . when i put bigger ohm resistor like 100k ohm , no short beeping sound comes , lower ohm resistor gives continuity beeps ,other big ones donest , as its a working psu , i am confused what to remove now or how to go further now .
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Hello, I have a pcb from an e scooter which had a faulty diode but even after removing it from circuit, it still has a short to ground on the three components circled. I have removed every cap on the board and tested one by one and the short is still there and all the caps test ok. Could this be because I haven’t put a diode back on it yet or where do I go next please? -
Hello everyone,
Firstly sorry for my english, french guy inside.
I brought a macbook pro A1708 - 820-00840 logic board, wasn't powering on.
History is a day, nothing happened when opening the laptop.
Nothing special inside, no corrosion, no liquid damage, never opened.
First, with the logicboard alone on the desk, mesures are :
5v017 and 0.000 amp. nothing else.
Finding a short on the PP3V3_G3H_VR, but not on the PP3V3_G3H (0.540 on diode mode), PPDCIN_G3H_CHGR_R present (5,1 volts) PPVIN_G3H_P3V3G3H around 4.1 volts. PM_EN_P3V3_G3H... -
this machine came to me as DOA and immediately found the issue as a 12v short to ground. Is it okay to inject voltage into that rail or does it have a potential path to the cpu or something? -
Samsung UN55ES7003
made house call.
red power led comes on, blinks twice, no display, no backlight, relay clicks, repeat.
psu has self test feature.
disconnected from mainboard.
determined PSU ok BL ok.
suspect mainboard.
disconnecting tcon has no change on operation.
markings on mainboard:
BN97-06531P 0151
BN94-06123R
found and ordered replacement on ebay https://www.ebay.com/itm/394077328633
for 54$
second house call:
with replacement mainboard, tv turns on, has sound,...
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