It seems that my other thread got deleted because I included my ST number. It was deleted before I got to read a post that someone posted.  I could really use your help again. Thanks...

Can you post a picture of what you are talking about?  That might help to identify the component in question.

 

I believe this is what you are looking for. It is a Power Board. I bought a CPx board

with the same burnout problem on that board. D P/N is 0502U

http://cgi.ebay.com/Dell-Latitude-CPx-DC-DC-Board_W0QQitemZ280047510958QQihZ018QQcategoryZ3666QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

That is it...You are a life saver.

 

Thanks so much!!

Hi, need help. I have Dell Latitude Cpx model No. PRX, "Latitude C Family".  I push the power button, the hard drive light comes on for a second, the screens back lighting comes on, and then everything just turns off. The battery charging light stays on though. Don't know what to do, do I need to take the computer apart? Does this sound similar to your power board problem.  Anything will be appreciatied. Thankyou. 

Try using your RAM modules one at a time in both slots singly and see if it will boot with any configuration. The CPxH/J, the CPtV/S and Inspiron 3700/3800 series all use the same mainboards and all are prone to develop Bad RAM slots. If no joy there, try reseating the CPU/Integral circuit board next. If that is unproductive, you can then obtain a Power Board and try it; the first two checks will cost nothing to try first before you spend money on a power board.