I Recently bought a scanner from ebay.

A scanjet 8250, with outo document feeder (double sided). The document feeder was said to be faulty, & there was no power supply.

For $66.00 it was a good bargain.

Getting a 31V / 2500mA power supply was something else… I eventually built my own (with some help from Jaycar).

I had a close look at the document feeder, & it wasn’t difficult to fix (someone didn’t re-assemble it properly). It worked fine for a few weeks, but one day, it just locked-up.

I pulled out the power cord & plugged it back in, but nothing happened. I dismantled it it looked like the fuse had blown… I decided to try to bypass it, & it seemed to startup ok… so i pulled out the power cord, & re-assembled it.

Then it wouldn’t work start again… I took out the main board & measured some voltages, & the board seemed to have power at various points , so the problem could be something subtle on the board (not being an electronics wiz, I don’t know what else to try).

So I now have a very nice scanner, which won’t power-up, and I’ve no idea what to do.

I’m open to any suggestions.

Update: I ended up reselling it on ebay