pwr supplies that take the mobo out

[jza734]

How many techs have seen this issue:

customer's power supply dies, and upon replacement of the power supply the motherboard is dead as well.
I've seen it before, and i've talked with several technicians that swear it happens. Since I didn't have great faith in their abilities, i didn't concur. Can anyone shed some light on this?

[Gollo]

Most often your power supply will go bad because of a surge of electricity and before it "blows" it increase the power that it transmits to the mobo thus "frying" it. It doesn't happen with every bad power supply but it is pretty common

[freddy]

</font><blockquote><font size="1" face="Trebuchet MS, Verdana, Arial, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Trebuchet MS, Verdana, Arial, Helvetica, sans-serif">Originally posted by jza734:
<strong>How many techs have seen this issue:

customer's power supply dies, and upon replacement of the power supply the motherboard is dead as well.
I've seen it before, and i've talked with several technicians that swear it happens. Since I didn't have great faith in their abilities, i didn't concur. Can anyone shed some light on this?</strong></font><hr /></blockquote><font size="2" face="Trebuchet MS, Verdana, Arial, Helvetica, sans-serif">posted this several months ago :

friend of mine with a p3x500 etc etc , left his machine plugged in whilst he went on holiday , when he came back it was dead ,,,re rung me up , and after checking the following parts were "blown" ,,,,,psu m/board vid card cd-writer dvd scsi card s/card etc etc

the only parts that worked were the cpu (INTEL) and ram.

now he worked for the local electric company ,laying cables so he checked the work in the area and records showed a "large" spike in his area

although the info was confidential , he showed it to his insurance broker (who he had know socialy for a good lengh of time) and he autherised a new machine for him.

[jimmm33]

I had one today where the power supply blew and the machine would not boot unless I replaced the power supply and removed the 3com Nic. The nic was dead, rest of machine OK.

I have seen a blown power supply take out everything in the machine except optical drives. I replace a lot of blown power supplies and I think about 40% of the time it takes out the mobo.

[Mayhem]

Fixed a machine for a friend a couple weeks ago. Spike blew is surge strip, P/S, RAM, Sound and NIC, exploded chips on M/B, CD ROM, HDD and video.

Only thing that still worked was the floppy.

[Cleetus]

Personally I haven't seen it but am glad it didn't happen to the g/f's work pc. Of course, I am making her watch the performance of the machine just in case something did get messed up. I get free club(tennis, gym, bar, pool) membership, and fix one or two computer problems every couple of months, not too bad of gig.

[Stanley_Kubrick]

I've seen it once or twice...

[Budd]

i have a Compaq in front of now with a bad psu, motherboard, and memory chip. rest of machine is ok though

[jza734]

Thanks Guys! It helps to know that other people experience the hell of technicianship.