Question about Compaq PRESARIO SR1475CL AMD Athlon 64 3400+ 2.40GHz, 512MB DDRAM, 200GB Hard Drive, LightScribe DL ... (PW711AA) PC Desktop

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Motherboard failure Hi I have been told that my motherboard in my Compaq Presario , which is 2 .5 yrs old and has not been used for 1 year , has failed. Can someone please tell me how a motherboard can fail. I bought a new monitor and plugged it into the PC and I got "No Signal" on the screen for a few seconds before it went blank. The monitor is OK on my other PC. I have been quoted 400 AUD / 600 USD for a new motherboard. Is this a reasonable cost? Thanks

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Failure of motherboards is usually due to breaking capacitors. A few years ago a capacitor company stole the "recipe" for making capacitors from another company and tried to make their own, unfortunately they did not get the ingredients right and the capacitors started breaking after 2-3 years of use. They sold these capacitors at very cheap prices and a lot of computer companies and power supply makers bought them. This is easy to diagnose. Look for capacitors (caps) (they look like little tiny soda cans) on your motherboard (mobo). They should be perfectly flat on top and not bulged or swelling or leaking anything. The dead giveaway is the fact that you are not getting a monitor signal and if you listen to your computer as it starts up, a few of the devices may not start (hard drive, etc). A failed video card will also give you "No signal message", but the computer should sound normal when starting up. Mobos are usually expensive to replace because the computer makers have them made especially for them and only order so many. They usually do not have a lot of extras laying around. There are a few companies that will repair broken capacitor issues. Hope this explains why they can fail. They can also fail if overheated (like when a case cooling fan fails), the cpu is overclocked and not cooled down (which raises temps), the power supply fails or by lightning and power surges. Also if you add a bunch of extra components without upgrading the power supply you can suffer underpowered situations.

Posted on Mar 11, 2009

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