Yes most all PC's can be "Fixed" it is just a case of parts and money.
http://www.retrevo.com/support/HP-DV5-1140-Laptops-manual/id/23082bh634/t/2/
Above your user manual below your service and repair manual.
http://h10032.www1.hp.com/ctg/Manual/c01550108.pdf
Try this below it may work?
Above is your user manual, below is your Service and repair manual. Please perform the troubleshooting steps and you should soon be able to isolate and repair your PC.
Ok perform a system restore, press F8 at bootup and choose safe mode desktop, when you are asked if you want the safe mode desktop or system restore, choose restore, and when ask if you want restore or desktop choose restore, restore to a time BEFORE the driver up date and follow instructions and reboot, you should be back where you were.Or start up in safe mode desktop, at desktop, go device manager and "Roll back" the driver. reboot, should be OK
You will have to troubleshoot and find out where the fault is.
Here is what I do…..
First, check the Power is ON, cable is OK and IN PC,
Then open PC up, and remove all power connections from everything EXCEPT the Motherboard Connector.(s) (Remember where they go, draw a diagram etc)
Power the computer up, and does it switch on? NO, Then, remove the RAM, does it Boot up? YES Faulty RAM, replace. If it still does NOT then your Power Supply Unit is probably Faulty.(But it may be the motherboard) either way we need to test more with a known good power supply.
With know good PSU, plug this one into the Motherboard Connection(s). Does it work, YES. Problem Solved.
OK back to Frst: Because it DID go the PSU WAS OK,
The MB was OK & the RAM was OK,
Now then we plug in each of the other Items, DVD Hard Drive, etc, etc. One-at-a-time, until we find the one that stops the PSU. (It has protection and will "Shutdown in event of a fault")
The one that stops the PSU is your culprit, replace whatever it is.