MBP not boot HHD or USB

[sonspot]

Hello, long time member that rarely post but I read a lot lol.

The problem I'm having is my MBP won't boot from the internal hard drive or usb stick or drive, what I get in a flashing folder with question mark. Its not the hard drive, I took it out tested it on a different computer and it works fine. I'm also going to rule out the internal cable because when I use the usb (both port) with a external hard drive or flash drive and hit opt (alt) it does not work, the flash drive or light on the external usb hard drive flashes fast and I still get the flashing question mark. It also does not boot from the super drive.

Any help would be great..

thanks

2010 MBP 13.3, 2.4ghz

 

[duervo]

What is NVRAM?

A small amount of your computer’s memory, called “non-volatile random-access memory” or NVRAM, stores certain settings in a location that OS X can access quickly. The settings that are stored in NVRAM depend on the type of Mac you're using, and the types of devices connected to it.

Information stored in NVRAM can include:

Speaker volume
Screen resolution
Startup disk selection
Recent kernel panic information, if any

If you experience issues related to these features, you might need to reset the NVRAM on your computer. For example, if your Mac starts up from a startup disk other than the one you've specified in Startup Disk preferences, or if a question mark icon appears briefly when your Mac starts up.

How to Reset NVRAM on your Mac

 

[sonspot]

How to Reset NVRAM on your Mac

Trust me that is not my even close to being the issue, wish it was. that was first think I tried.

Anyhow, it seems the memory slots and keyboard is part of the issue.. What I did was swap in two different ram from my other MBP, same result, then I tried only one in the bottom slot and I got a beep. next tried the top slot and it booted up but still got the flashing folder so I swap ram and it booted up fine.