Solved Opinions wanted on fried Mobo

Custom built pc / mac boo... / Custom built pc / 13' mac...
June 24, 2016 at 07:51:28
Specs: XP pro / Windows 10 / Mac Osx Yosemite, 3.013 GHz / 3326 MB
Hi Guys, My sister-in-laws grandson is taking an online course in game creation and suddenly his computer died. They tried another PSU and decided that wasn't the problem. He took it to the Geek Squad, and they said it was the Mobo. That's usually their standard reply. So the kid orders a new Mobo and more Ram. He took it to a local company at that time, because the Geek Squad was ripping him off. The Geek Squad told him the processor was fried too ( core I5). So he bought a new processor and the new guys are telling him the graphics card is fried also. I have a hard time believing that the mob fried and all the components too. There was no original power surge or lightning strike. Do you think that if he panicked and threw the switch in the back to 220, that it would fry all the parts. I don't know what he did or didn't do, but this sounds fishy to me. What do you guys think? Thanx.

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#1
June 24, 2016 at 08:48:41
✔ Best Answer
Setting the power selector to 220V if 110V is required will NOT fry anything. What happens in that case is all the voltages that a created would be HALF the required values. Most current PSUs no longer have a voltage selector switch but automatically sense the input voltage.

It is possible a power supply failure can take out the motherboard and all the components plugged into the motherboard but highly unlikely.

You didn't mention changing the power supply.

If there were a power surge due to a dying power supply you may see some evidence of the damage. Burned contacts, exploded or bulged, capacitors, etc.

How about posting some system specs. Paying attention to the brand and model of the power supply.

One thing that possibly could cause a problem would be reverse polarity due to an un-grounded or improperly wired outlet. If the computer had been working OK while connected to the same outlet then that is also unlikely.


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#2
June 24, 2016 at 09:03:58
Thanx OtheHill. They did swap out the power supply, but that didn't work. It was an Antec 450 watt. I don't know the specs, it was hand built. It had been plugged into the same receptacle for years, so we can rule that out. I didn't get a chance to look at it personally. There is no logical reason that all the components would burn out for no reason. They tries a new psu and then gave him the old one back. I smell a rat and I think they're ripping the kid off. Almost $2K so far for parts and labor.

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#3
June 24, 2016 at 11:04:18
Wow, could have built an entirely new rig for less than that.

When installing a new MBoard one must be aware that the standoffs may be located in different locations than the original. Extra standoff in the wrong can short out the board. Also, there is usually ONE standoff that MUST be installed to serve as a ground. That screw hole will have a ring of solder around it.

Have him bench test the board outside of the case.


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#4
June 24, 2016 at 11:40:50
He actually took it to a local shop for repair. He doesn't know anything about hardware. I know they took advantage of him, but he wouldn't listen to me. He got a new I5 cpu, 32 gigs of ddr4 ram, a video card that cost over $400. Probably need a more powerful PSU. He needs a computer built for graphics because of the courses he's taking. His Grandmother footed the bill. After he wouldn't listen to me, I bowed out. For the life od me, I can't see what took out the board and all the components. I'm afraid the place he took it to be assembled didn't consider the PSU was only 450 watts and not a single volt rail setup. Maybe the video card didn't work because the PSU was under powered. But if he reused the same card, it was powered by the Antec 450 before this. I'm in the dark because I didn't look at the machine close enough. He was in a rush to get all new parts. Well, thank you for the input and take it easy. Are you retired yet? I retired over two years ago and loving it.

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#5
June 24, 2016 at 13:57:28
Why don't you get hold of all the components and check things out for your self. may be able to assemble another system. No telling if those parts are actually defective at this point.

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#6
June 24, 2016 at 14:21:30
I''ll see if they give them back to him. That's a good idea. Especially the video card. Thanx for the input.

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#7
June 24, 2016 at 18:40:18
Your welcome. They can't keep his parts anyway. He should have left the shop with them.

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#8
June 24, 2016 at 18:40:18
Your welcome. They can't keep his parts anyway. He should have left the shop with them.

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#9
June 25, 2016 at 04:51:57
I saw him last night and he said they gave him the old parts. He has the new machine up and running and he's back in school. Thanks for the input. Have a good one.

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