Repariere deine Sachen Community Store

Reparaturanleitungen für Computer, die über kein integriertes Display verfügen und für den stationären Gebrauch gedacht sind.

2130 Fragen Alle anzeigen

Einstellungen

PC not responding after possible lightning

I believe my house was struck a few nights ago - zapped AC control board, TV, and a few power adapters. PC not responding at all (was plugged into surge protector for initial strike, and completely unplugged immediately after)

I've tried replacing the PSU, but it didn't help. I've read that the PSU fan should spin when turned on, but I'm not sure that's completely accurate.

Not sure what troubleshooting steps are next. Can anyone give me a step-by-step run down?

Intel i7-11700 cpu

AsRock B560M Pro4 mobo

Crucial Balistix 3200 memory

EVGA 10-BQ-0600-K1 psu

WD SN750 NVME m.2 ssd

Sapphire Nitro RX 480 gpu

Beantwortet! Antwort anzeigen Ich habe das gleiche Problem

Ist dies eine gute Frage?

Ja Nein
Bewertung 1
Einen Kommentar hinzufügen

2 Antworten

Filtern nach:
Am hilfreichsten Neueste Älteste
Gewählte Lösung

Einstellungen

The motherboard may be in a protected state, similar to if your laptop falls. You could try removing a stick of ram and try to power it on.

If that doesn't work, try removing the bios battery for 1minute, connect it again and try to power the system on.

You have probably tried this but it could also be the fuse is blown in the plug for the pc, you could try another cable and also try powering it on directly into the wall and not through the surge protector.

War diese Antwort hilfreich?

Ja Nein
Bewertung 0
Einen Kommentar hinzufügen
Hilfreichste Antwort

Einstellungen

Hi @jeffthewhiteguy

Did you try connecting the PC directly to a wall power outlet and not through the surge protector, in case the protector is of the sacrificial type i.e. only works for one power surge event and now doesn't work, you never said?

You could try the paperclip test on the original PSU to check if it turns on and if all its voltage outputs are OK but since you tried a different PSU this only proves whether the original PSU is OK or not.

Was the PC turned on at the time of the lightning strike? If so you may have two problems i.e. faulty PSU and faulty motherboard.

If the PC was on and the original PSU tests faulty using the paperclip test then most probably the motherboard (power mosfets?) may have also been damaged by the surge and that is why the replacement known working PSU now also doesn't work with the motherboard.

What is the model number of the motherboard as printed on the board itself? I can't find a schematic using the model name but sometimes the number from the board (if different) gets results.

If the motherboard and PSU are both faulty maybe check your household contents insurance policy to see if storm damage of this nature to electronic/electrical devices is covered by the policy. Just a thought

Update (05/12/2022)

@jeffthewhiteguy

It won't boot without a CPU, but you should get some indications that it should be starting and that there is power on the motherboard

Try connecting a system speaker to the motherboard header pins (see p.20 of the user manual)

Here's an image of the Asrock beep error codes that may help. Although if the PSU is not turning on I don't think that you'll get any.

Block Image

(click on image to enlarge)

Something's is obviously wrong on the motherboard and without a schematic it will be hard to find.

A motherboard diagnostic card may also help but it also relies on power from the motherboard

War diese Antwort hilfreich?

Ja Nein
Bewertung 3

5 Kommentare:

The PC was plugged into a surge protector with 2 monitors and speakers, yet it was the only one affected.

I didn't voltage test the PSU, but I tried the "paperclip test" and the fan began spinning.

The PC was not on during the strike - it was plugged into the surge protector, but the PSU was switched off.

I forgot to get the board number while home at lunch, but here is the link to the product page:

https://www.asrock.com/mb/Intel/B560M%20...

von

@jayjeff

I tried booting it up again yesterday, after clearing the CMOS and removing the RAM, but again nothing happened.

I did notice that the heat sink in the lower right corner (labeled ASRock) began to heat up quickly even though there was no other signs of life from the system.

I'll try ordering a replacement mobo and hope that works... I was really hoping I wouldn't have to tear it all down :(

von

@jeffthewhiteguy

How did you try to clear the CMOS? Was it by using the CLRMOS1 jumper on the motherboard?

If so try the old fashioned method of disconnecting the power from the PSU and then removing the CMOS coin cell battery from the motherboard and then press and hold the Power On button on the case for a "full 30 seconds" and then release. Reinsert the battery and reconnect the power and check if it turns on.

Last thing to try perhaps is to create a "barebones" PC and see if it starts and that you can get into BIOS.

Disconnect everything you don't absolutely need to have from the PC i.e. HDD, SSD, ODD any add on cards except GPU card (if it is needed - does the CPU have integrated graphics if so use that?) and any connected external devices and have only the keyboard, motherboard with ram, PSU and monitor connected.

This is just in case one of these components is affecting the power supply to the board.

von

A new MB won't fix it if the CPU is fried. If the MB voltage regulators are bad, changing the CPU won't fix it either.

Something heating up quickly might indicate a voltage out of spec. I would remove everything not essential to it booting including RAM and see what happens. If it is still dead then you need to pull the CPU and cards and verify the MB voltages. Replace the CPU and again verify the voltages. Replace the cards, check voltages. Replace RAM, check voltages. Somewhere you will isolate it.

von

@jayeff

Tried the "barebones" solution yesterday and still nothing. I didn't hook up the monitor, but no fans spun up and no LEDS on the mobo lit up.

Would a mobo boot to bios or show any signs of life without a CPU? I don't want to take the CPU out if not 100% necessary.

von

Einen Kommentar hinzufügen

Antwort hinzufügen

Jeff wird auf ewig dankbar sein.
Seitenaufrufe:

Letzte 24 Stunden: 3

Letzte 7 Tage: 18

Letzte 30 Tage: 118

Insgesamt: 1,747