InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Solve : Forgot to go from 115-230V in Europe? |
|
Answer» Computer It's more likely that a bunch of capacitors blew up... But I like the idea of hotwiring a computer. Exactly, No way anything can POSSIBLY go wrong doing that, right?The below shows you don't know much about power supplies. Exactly, No way anything can possibly go wrong doing that, right? The shorting of those wires is standard fault finding practice. Quote from: Lisa_maree on January 13, 2012, 06:13:38 PM The shorting of those wires is standard fault finding practice.They don't need to find a fault. There is one there as a result of accidentally leaving the switch on 115v. Also, last I checked, the green wire was the PSU ON. I'm not really sure how shorting that to the ground would tell us anything about the standby voltage, which is the purple wire, nor do I see what the standby voltage would have to do with starting the computer/PSU, since that is more or less dictated by the PSU_ON signal; Of course you could short that out, but considering it's impossible to know what other damage was caused I don't see it as a good idea. Never say never, but typically under voltage doesn't cause the problems that over voltage does. Brown outs are not that unusual in most of the world and usually just cause appliances not to work. I did lose a 115v hairdrier once when plugged into a 230v outlet.Quote from: BC_Programmer on January 13, 2012, 06:44:32 PM They don't need to find a fault. There is one there as a result of accidentally leaving the switch on 115v. Well said... The other caveat is over-voltage is far more damaging then the alternative...there really is no way to tell what's left of that PSU without spending STUPID money to find out... I agree with Raptor...you need a new PSU...Period.Power supplies do fail when put into 240 volt. But some do behave well having enough with self-protection for that kind of extreme abuse. That is feature called an auto-switched PSU. Also found in MANY TV sets and other electronic things. Apparently your PSU did not have that feature. It is possible that part part of the PSU blew but protected the motherboard and drives. But you can't be sure until you try a new unit. It is not certain that the PSU would protect the motherboard. A better design would be to have the PSU protect itself from the 240/.120 volt switch mistake. But many manufactures just don't do that. It adds a bit cost. Most likely a new PSU will solve the problem. Don't attempt to repair the old PSU. Let a tech do that, if he thinks it is worthwhile. Was unfortunate enough to have had the same problem a few years back and after the smoke cleared was convinced I had fried the motherboard too! Luckily, a new power supply did the trick and didn't turn out too expensive. Good luck! |
|