Try powering up holding the D key, be patient as this boot takes a few minutes, when the AHT icon comes up (looks like a chip) follow the prompts, click the extended test which will take a while. You might have to do a command R start, and run utilities.
You need the original discs that shipped with your MBP.
Versions of Apple Hardware Test designed for other Macs, such as your iMac, will not work.
Contact Apple to purchase a set of replacement discs for your MBP. There is no substitute for them.
You may attempt to load an Internet version of Apple Hardware Test by holding option d as you boot your Mac. Not all Macs support this method:
Some computers that are upgraded can't use the Internet version of Apple Hardware Test:
If you are experiencing this issue, Apple Hardware Test is available on the media that came with your computer. See Intel-based Macs: Using Apple Hardware Test for more information.