Designjet 5000 PSU--Replace with 1050C PSU possible?

Question

So I think the PSU has finally gone out on my Designjet 5000PS 60" printer.  It's been an intermittent problem for a few weeks now, sometimes booting up fine, other time giving me an error saying the HD has failed.  I've pulled out the HD and powered it up on another computer and it spins up just fine.  I put it back in the printer and it won't spin.  I metered the power into the HD and it shows 4.8 for the 5 volt and 0 for the 12 volt supply. I have a power supply from a 1050C that I can swap in.  Anyone know if that's compatible between the two models? Just to confirm the HD was okay, I powered it up from a separate power supply while the HD was in the printer and it spun up okay and got a confirmation on the screen.  It then went on to initialize but then gave an error that, when I looked it up, said it's either the trailing cable or the power supply.  I can replace both, if needed, but since the meter read 0 volts, I figured that was the better option.  Unless anyone thinks the trailing cable not seated correctly would stop the HD from spinning up. Thanks!

Answer 1

I don't think it could either.  But here's a quote from that thread I mentioned in my previous post: The error occurs where the PSU fails a digital check on power up.
The psu does two checks, one digital followed by an analogue one.
There are two LED's on the Main PCA immediately above the Memory Slots. When the unit is switched on from the back the RED LED should come on for the digital check of the circuit. It checks: psu to main pca, main pca to firmware, main pca to interconnect pca, main pca to iss pca also main pca to trailing cable connection, main pca to hdd (where present).
Where any of these fails then the message will arrise and the GREEN LED will not light up signaling an analogue check of the circuits failed. No power applied.
Soooo... where no red led psu is definitely gone (order part Q1251-60122).
Where red led and no green check all electrical connections. Could poss be another part that caused the failure.Tropical areas and electrical connections being what they are.
Where it is another part be sure to meter all motors, in case you put in a new psu and it gets blown out again straight away.
 Don't know how accurate that info is.  I do have power to the red (D-2) but not the green.  But does that mean the PSU doesn't send power to the HDD until it checks all those connections first?  That's what I'm taking away from that.