Strange thing when replacing the harddrive

I replaced the harddrive in a MBP around 2009, a WD Black 500GB 7200rpm. I did forget to disconnect the battery.

The turn-on "boing" (maybe the sound is turned to 0%) is not there when pressing the on-button.

Some times the screen "flashes" white and directly gray, it begin to boot my USB-stick with Snow Leopard. I little while after there is a kernel panic telling me to restart the computer. (It can be that the SNL-USB is incompatible with the model, I dont know.

Have tried a internet recovery but it stated error 1005 something...

Could it be faulty memory or bad placed memory? (did loosen one to check the version).

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