VMU says defective?

[Circuit_Hero]

Soo I have like 5 vmu that all say they can't save because vmu is defective. I played multiple games like DOA 2, Tokyo Extreme Racer 2 and Rayman 2 and the save fails but on Sonic adventure it saved perfectly fine. Do they not like sequels? What gives? I put fresh batteries in one and it worked for a day and then back to the same old. Help me !! Please and thanks in advance

[Roel]

Have you tried formatting the VMU yet?

[Circuit_Hero]

Have you tried formatting the VMU yet?

I have. Still no good

[pcwzrd13]

Since it's happening with multiple VMUs, I'd say the problem lies with either the controller or the controller port. Try saving with the controller plugged into a different port. If that doesn't work, try another controller altogether.

[Circuit_Hero]

Didn't work. I tried both methods and all 4 ports. Save failed or vmu defective message

[Jenkins]

Modded console?

[Circuit_Hero]

Nope. Feel like the Damn console might be defective too