HP 32SII success and woes

[ElectroDuende]

(02-11-2015 02:55 PM)Don Shepherd Wrote:  I've got three 17b's, all have the metal plate and work fine. I've got one 32sii, it does not have the metal plate and it has always worked fine as well. My guess is the lack of the metal plate is probably not to blame for this particular problem.

Neither my 32SII, 20S nor 21S have the plate, while the 17BII and 27S have it. I'll have to check on the 22S, but its out of reach now... As you say, it shouldn't matter if it is present or not regarding this problem.

I once saw this very same bahaviour in a 32SII (with different symbols on display), after a change of batteries, but it was solved just shorting the terminals with a coin and pressing ON several times. After refitting batteries everything worked again.

As it doesn't seem this is your case, next step will imply opening the case and looking for bad connections (display zebra connectors) or even soldering defects in the main (and only) integrated circuit. It is not the tape automated bonding circuit of the first pioneer models, but it is still quite sensitive, as it is placed in a hole inside the PCB:

http://www.keesvandersanden.nl/calculato...repair.php