First thing, before applying power to the player again, make sure there isn't a loose screw inside the player.

The garbled display and the refusal to boot would generally be unrelated to each other, and might be a case of simultaneous coincidental failures, except in a situation like the one I warn about above.

Garbled display is usually blown fuse or display ribbon cable trouble, investigate those.

You said the player had several years of trouble free operation. If, during those several years, you never applied the 2.0 firmware upgrade, then refusal to boot could simply be hard disk trouble. 1.0x firmware simply refuses to boot if there is disk trouble. If the 2.0 firmware is on the player, then it would give a message about "hard disk not found" if there is disk trouble.

In any case, opening the player to investigate is your next step. Make sure to carefully follow the opening the player steps so that you don't damage anything in the process.