My Compaq Presario CQ50-110US switches off and has burned up several power supply cords

Try to replace your power supply. Most cases on this kind of problem is on the power supply.

Melinda:

From your description there could be two different parts, one would be the power adapter that the AC power cord plus into, or the other would be the connector on the laptop where the DC power connects into.

You can buy either of these on ebay. Just search Compaq Presario 700. There are several power adapters and there are many parts machines that you can cannibalize the power connector.

Would check the switch at the front of the pc.Have had several issues with that particular switch getting pushed out on compaqs just enough to allow them not to turn on.Would also verify that all powers supply plugs are pushed in all the way.

1. You possibly have a damage ac cord
or you have damaged connecting plug at the PC .
2. try to obtain a new AC cord.
3. Another possibility is the power supply for the PC needs replacement.
4. A PC technician can determine this for you.
Contact Compaq for repair rates because most likely this is a special power supplied system.

I hope you have some warranty left on this pc. It could be a defective power supply.

Check your memory sticks to make sure that they are full inserted and did not come loose. Check the power from power supply going to HD. Make sure it is getting power. You can also remove your motherboard and test components with an ohmmeter to see if there are any burned out components which is very possible. Have seen bad boards and bad power supply's both cause your problem

Try another power cord first to be sure; if that doesn't works, then replace the power supply.

i worked for hp and compaq it is well known issue to reslove this issue

1#turn off the computer and uplug the power cable from the computer and then hold the power button for 20 second then turn on the computer and the momment you back to desktop screen
go to download driver from hp site and here is the web site http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=pv-43507-1&lc=en&dlc=en&cc=ca&lang=en&os=228&product=1841849 and restart the computer .

You have shorted DC connector in laptop.
It needs to be replaced. Very common problem.

Very possibly. Is the switch on the back of the power supply in the  on (1not 0 ) position?
http://h10025.www1.hp.com/ewfrf/wc/product?product=1841795&lc=en&cc=us&dlc=en〈=en&cc=us