Canon 5D classic won't power up!!

[HL45]

I bought this camera used about a year ago, It has worked fine up until yesterday.

I tried changing lens, charged the batteries, switched cards and even picked up a new date/time battery.

Anybody else been through this? I hate that I might have to send it to repair for something I could fix myself.

Any suggestions?

 

[Robin_Usagani]

Look through the battery slot. Make sure you have full contact. Nothing is dirty or bent.

 

[HL45]

Look through the battery slot. Make sure you have full contact. Nothing is dirty or bent.

Checked it again just now, cleaned the contacts, nothing bent, still won't power up