Dave wrote:
Save yourself the hassle and just replace the $10 worth of electrolytic
caps in the PS... it really doesn't take much longer to do 10 than 1 once
you've got it all apart on your bench, the iron's heated up, and you're
ready to go.

Thanks, I think I'll do that when I've had a chance to buy the caps (there
are some odd values like 180uF 400V and 1200uF 35V). There's some singeing
of the PSU PCB on the primary side but all the joints look OK... but I can't
measure the resistors near the singeing until I get my multimeter sorted
(see Fluke 87 thread).

Dry solder joints can be affected by heat/cold in addition to physical
movements. I haven't run into soldering problems on HP printers,
particularly older ones but it's possible... HP had very good QC whilst
they dominated the laser printer market.

The build quality is pretty good, especially with the service manual saying
exactly how to remove each part.

Theo