Scanner Help

I have an epson espression 800 scanner. It seems to have shat the bed. Yeah its older but still does the job. So the problem is:

When i push the power button nothing happens…if i pull the serial cable out from the back of the scanner it turns on. This ever happen to anyone? I deleted the drivers and reinstalled jsut to try it out. Obviously this is not worth fixing if it is an expensive harware problem, so im jsut wondering if there is a simple fix for this.

Thanks for any insight