Q: White screen of death on power on

What happens when you reset the PRAM or try to boot into the Recovery Partition?

On newer Macs it's called nvram.

How to Reset NVRAM on your Mac - Apple Support

Maybe you should run an Apple Hardware Test or Apple Diagnostics depending on your Mac.

Using Apple Hardware Test - Apple Support

Take it to your local Apple Authorized Service Provider to be professionaly diagnosed and decide what you want to do. If you don't know of any in your area click the link below to begin finding one.

https://locate.apple.com/country

Maybe resetting the SMC (System Management Controller) could help... at least have a try.

If the battery is nonremovable

1. Shut down the Mac.
2. Plug in the MagSafe or USB-C power adapter to a power source and to your Mac.
3. Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time.
4. Release all keys, then press the power button again to turn on your Mac

If the battery is removable

1. Shut down the Mac.
2. Disconnect the MagSafe power adapter from the Mac.
3. Remove the battery.
4. Press and hold the power button for 5 seconds.
5. Reconnect the battery and MagSafe power adapter.
6. Press the power button to turn on the Mac.

The LED on MagSafe power adapters might change states or temporarily turn off when you reset the SMC.

It worked?

Resetting the SMC won't do a thing. However he can try it and I'd love it if I was wrong.