Question about eMachines ET1641-02w (PT.NA60X.001) PC Desktop

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MCP73VT-PM Got up one morning and nothing on screen even though powered up. I tested ps then swappped memory and another cpu. Hd powers up but nothing on monitor no sound or picture. I even pulled out pci cards. any ideas

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  • Luis Loaiza
    Luis Loaiza Jan 11, 2012

    Does it have integrated video card or an independant video card?

  • GI Consulting Jan 11, 2012

    No POST beeps?  That's not a great sign IMHO.My best guess is that your mainboard has died.  Inspect the board, especially capacitors around where the PSU / Power Supply Unit connects to the board.  You may notice them bulging and/or leaking.In my mind, anymore, if I'm going to bother swapping a CPU, I'm likely going to be swapping the mainboard as well (because I will be upgrading).

  • justoldbobo
    justoldbobo Jan 12, 2012

    intergraded graphics card I tried an older card I had but still nothing. no beeps except when I pull all memory out. I havent noticed any swollen or leaking capacitors.

  • GI Consulting Jan 12, 2012

    When everything is working properly, there should be one beep approximately right before you see the Windows logo appear. If it never did that during the entire time you've owned it, then I would presume it was disabled in BIOS settings (some computers have the option and some do not).

    I'm sorry to say you may be in the market for a new computer, unless your eMachine is under warranty.

    Amazon.com: Windows 7 Home Premium Computers ~$299 and Up
    http://www.amazon.com/mn/search/?_encodi..."

  • Luis Loaiza
    Luis Loaiza Jan 12, 2012

    If my theory is right then what could happen while you were sleeping the was a high voltage wave into the outlet plug and that probably made a electrostatic wave and screwed on the motherboard.

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It's a very old thread but I just wanted to leave some info because nearly 1000 people have read it so far . . . .

It's extremely rare that a mainboard will just die suddenly without reason - I've seen 2 in the past 10+ years. All others have just needed a quick fix and are generally affected by overheating, faulty RAM, CPU, CMOS battery flat (does stop some things booting), stuck keys (usually causes beeping but not always), badly seated video card or other PCI card, or the biggest problem of them all - a faulty capacitor.

The motherboard mentioned (MCP73VT-PM) has 4 main capacitors, an on-board speaker, and no option to turn off the speaker in the BIOS - so when testing, if you don't hear a single beep after 3 seconds, it's still not working properly. If you remove all RAM fitted and turn it on, it 'should' give a constant beeeeep till you turn it off again - this shows the board is testing for memory okay, and indicates it's likely the capacitor problem.

Most faults can be narrowed down by trying a known working spare part, but if all else fails, I go for changing any of the larger sizes of capacitor on the mainboard. Capacitors are the most dodgy of all components and can easily go faulty at any time, and don't always show any signs of a problem (they don't have to leak or expand).

Smaller sized capacitors rarely have a problem, but the larger sizes (physical size I mean) like 10mm wide, with any voltage and any UF - these can easily just stop working properly. It doesn't take a voltage surge/spike or overuse, or heat, or cold. These things can just stop for no good reason.

If your mainboard is worth keeping, just remove all of the bigger capactors and solder new ones in. It can be well worth it, generally expect to pay about £5 for 4 (depending on the values and the manufacturer). The board mentioned here has 3 x 16volt 1800uf, and a single 6.3volt 1800uf - it's easier to just replace all 4 items I think, rather than mess about testing each.

I hope that helps others who find this question.

Posted on Nov 28, 2014

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MCP73VT-PM dont buy a pc with this board in it.I have had 7 in my shop these last 2 months.The board fails after abut 15 months.

Posted on Aug 28, 2012

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Mmm that's not a good sign since the computer have integrated video card there a little chance that your motherboard has died, everything you would hear that is power on because the power supply do work properly but if the monitor doesn't show anything or do not hear any beeps, that probably means that your motherboard is dead.

Posted on Jan 12, 2012

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http://www.e4allupgraders.info/dir1/motherboards/socket775/ecsMCP73VT-PM.shtml

ECS GF7050VT-M5,

http://www.ecs.com.tw/ECSWebSite/Products/ProductsDetail.aspx?detailid=858&CategoryID=1&DetailName=Manual&MenuID=1&LanID=0

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Suggest you let the file download all the way, before looking through it.

I'm also looking at an ECS MCP73VT-PM on Ebay, as well as the PDF motherboard manual for the ECS GF7050VT-M5.

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From the poor view on the Ebay link, the MCP73VT-PM also seems to have the SP/DIF header in the same location, but clocked differently.

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