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Presario sr1620nx will not power up. green lights on power supply and by start button flash continuously. removed all connections from the mother board one at a time including memory and cpu. Light continues flashing until I remove the last source of power, the 40? pin connector. then lt stays on steady. power supply voltageswhen jumper on = 12v-11.74 5v-5.24 3v-3.37. Replaced the mother board -- same seario! Please help.

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Hi,

When the light on the power supply is flashing it usually indicates that the power supply is dead.
Here is the troubleshooting guide from Compaq/HP.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&lc=en&cc=us&dlc=en&product=3239113#bph06788_section_2

Something could have come loose on the board or connections. First thing to try is to re seat everything and check and re connect all the connections. If you are not comfortable about this have someone do it.If it is the power supply you can't fix it you will have to replace it.You may have a 12V ATX line (6 wires) that needs to be connected to the mother board in addition to the main power (about 20 wires). Make sure they are both connected - try again.

Remove 1 stick of memory - try again.

Swap the stick you removed with the other stick and try again.

Unplug the power switch wires from the header on the mobo - try again - make sure you write down where each wire goes. Try again.

Swap the power supply with another ATX to see if it is the power supply.

You could try the power supply you mentioned if the connections are the same.
If the same thing happens it could be the CPU has come loose or the thermal paste has dried out.

Check here for info on re-seating the CPU and applying thermal paste

http://www.arcticsilver.com/arctic_s...structions.htm


Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting fixya.com

Posted on May 19, 2011

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Have a great computing experiense.

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