hi all, I need your help I have in my hands an asus x555ld that does not turn on, but when I connect the board to the source I have a power consumption and the cpu heats up. I have the 19v, 5v and 3.3v on the board. I do not have the SCHEMATIC of this board but I already saw in the forum the SCHEMATIC repair. Someone has an idea of what this malfunction might be. thank you all
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Re: asus x555ld not turn on.
To post the correct boardview I need the motherboard version, but try to programm the bios first.
For the bios I also need the type of video card (number on the chip)
usually this type of laptop requires a reprogramming of the bios if all voltages are okLast edited by jasko_jacker; 02-14-2018, 12:10 PM. -
Re: asus x555ld not turn on.
thanks for reply, it is a asus x555ld rev 3.1
nvidia n15s-gt-s-a2Comment
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Re: asus x555ld not turn on.
i think is not a bios because i just change and the resulte is the same, no turn on and the power sulpy show consumption less 1amp, and cpu heats up. cpu is onboardComment
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Re: asus x555ld not turn on.
this is boardview for your model,Comment
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Re: asus x555ld not turn on.
thanks. its possible the cpu is in short?Comment
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Re: asus x555ld not turn on.
i have the capacitor PC9100 in short. i remove the capacitor and the short to be continued.Attached FilesComment
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Re: asus x555ld not turn on.
How much resistance to GND is on 1.05vs ?Comment
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Re: asus x555ld not turn on.
pin 1 3.10
pin 2 0.09Comment
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Re: asus x555ld not turn on.
Did 1.05vs exist on pin1 before removing this capacitor? I mean how much voltage on pin1?
it would be better solder the capacitor back onto the board.Last edited by caspian; 02-14-2018, 03:38 PM.Comment
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Re: asus x555ld not turn on.
no, i just remove and test the line, and put it back again. not power on without the capacitorComment
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Re: asus x555ld not turn on.
its normal the cpu have 1.08vs without the power on the botton on?Comment
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Re: asus x555ld not turn on.
when the laptop is off, 1.08vs should be 0v. Does the fan spins? Any LED gets on or blinking?Comment
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Re: asus x555ld not turn on.
i think the same, but in this case the cpu heat up after i plug the ac.
no leds and no spin, and i have the 3.3v in the botton on / offComment
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Re: asus x555ld not turn on.
does the GPU get warm? does the cpu get too hot or a bit warm? Now, measure resistance and voltage on all the coils you see on the mainboard, when the laptop is off but the AC adapter is plugged in. (It is after midnight here. I am going to sleep.
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Last edited by caspian; 02-14-2018, 04:18 PM.Comment
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Re: asus x555ld not turn on.
thanks for the help. its get warm to burn your fingers. but I found something strange, I have in the gate of the mosfets PQ8801 and PQ8802 24v, I already went to measure to the pwm and leaves the 24v from there. should be 19vAttached FilesLast edited by jp_jota; 02-15-2018, 06:46 AM.Comment
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Re: asus x555ld not turn on.
how much voltage is on the other pins of PQ8801?
how long does the cpu take to get hot?
is any heatsink installed on the cpu?
is GPU hot too?Last edited by caspian; 02-15-2018, 10:27 AM.Comment
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Re: asus x555ld not turn on.
its correct, 19v. only gate get 24v. in the boardview say 19v in the gate, and i have an equal board here but damaged too and it leaves 19v of pwm PU8800.
yes i have a heatsink installed for the cpu not to heat too much, it only heats in the small part of the cpu, in gpu I think.
gpu nvdia not heat.
on the whole board is only heated in the cpu.Attached FilesLast edited by jp_jota; 02-15-2018, 10:43 AM.Comment
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Re: asus x555ld not turn on.
probably, measuring PQ8801/PU8800 does not help find the problem. you should measure voltage on the big coils on the board and report which ones have voltage by their names which start with PL...Comment
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Re: asus x555ld not turn on.
ok. i just do it now...Comment
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Asus X555LD Laptop Board View & Clean Bios 3.6...10-06-2024, 03:04 AM
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Hello,
I have a problem with Asus X555LD after watter damage.
The KBC chip with some traces was damaged.
I changed KBC chip, repair trace. Laptop works great, but if I turn it off,
it turn on again. If I put adapter in it, it power on.
Any idea? Schematic is not available.. -
Hi,
I recently bought an ASUS ROG STRIX B550-F GAMING motherboard that was listed as "dead, not powering on." However, it does show some signs of life. I've performed several basic measurements and would like to share the results.- The board enters a "ready to power on" state after plugging in the PSU.
- Pressing the power button increases power draw.
- Sometimes, touching the RSMRST_L pad with a multimeter probe causes the board to shut off and return to standby.
(taken after pressing the power button, while the board is attempting to start)- H_SKTOOC#
06-11-2025, 01:05 PM -
Hi everyone,
I am trying to learn electronics repair. I purchased a “faulty for spares/repairs” ASUS X99-PRO/ USB 3.1 motherboard for a very low price from ebay – a good enough price to offset the high probability that the board was completely toast and not realistically repairable.
Initial results:
Board would power-cycle when turned on either with switch on board or shorting pwr pins. Fan would spin for a second or so and a QCODE of 00 would display then it would power off and then do the same thing again over and over. I think maybe 2 times in about 100 attempts... -
Hello, HP laptop model 15-EU0005NA. It does not turn on, 1 in 100 manages to turn it on then after a while it freezes/disappears/flashes, etc.
After removing the motherboard and connecting the board with RAM to the power supply, I noticed that at first all voltages start correctly and after a few seconds 3.3V on the PL4501 coil disappears and somewhere in this area something starts beeping on the board, sometimes after touching it with a finger in the area of PL4551 it stops beeping and 3.3V appears again.
Original HP 150W power supply, the diode in the power socket lights...
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