Question about Compaq Presario S6500NX (DQ181A#ABA) PC Desktop

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When i start the pc it gives me one short beep and one long beep that keeps on repeating. Every once in a while the pc doesn't beep and i get a flickering distortion like falling snow just in color(black, red & white) The computer was never tampered with so everything inside the case is well connected, and untouched!

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Several possibilities here:
Powersupply not working correctly, test with another PSU to eliminate this
Ram issue, Ram is failing under load, download a copy of memtest and run it to check for ram related issues
Video card fault. If possible, try another video card and see if this resolves the issue
Other faults and these are remote, are that the CPU heatsink is loose, the fan is working intermittently
(check and run with the side panel off), or in extrame circumstances, there is a fault on the motherboard

Posted on Jan 29, 2011

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Posted on Jan 02, 2017

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Disconnect all devices from the power supply EXCEPT the motherboard
Remove any extra cards including video etc.(plug monitor into the onboard)

If you hear any beeps these can indictate where the fault is.
either of these sites below will help you further with that

Beep codes Pc

More beep codes

Power up the pc and see if the fans are working.
If not then double check the power connections to the board.

If you still have no fans it is time to suspect the power supply as the probable cause.

If the fans worked then you should have gotten a display which told you there was an error and offering you a chance to go into the BIOS. ignore it and shut down the PC.

Now connect one drive only and boot again.

Repeat that until you identify the component that is giving you a problem.

Once you find the problem then remove or disconnect and carry on with the rest to see if another component might also cause a problem

If there is only one problem device then you may want to investigate that device further, Unless you don't mind replacing it
Hope this gives you the information you need

Hope this gives you the information you need

Bob
Moderator

It would be very decent of you to consider the quality of our experts answers and judge them accordingly as you pass through FixYa.

Thank you

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hope this helps

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