The Analyser's last known address was Cambridge, England. Damp, but cooler than Florida !
I made a mistake in my previous posts. I'm working on an 8903A and the 8903B at the same time. After I discovered the goo in the 8903B I picked up and photographed the pcb screen from the 8903A.
The 'A has brown sticky back foam which looks OK.
But when I looked at the pcb screen from the 'B all was revealed. It has black foam with clear signs of oozing and movement. I've pulled it off. I found the best way to get rid of the residue left on the screen was to warm it with a heat gun and rub it off with paper towels. (IPA turns it into disgusting sticky rubbery balls that are hard to remove.)
The pictures show the pcb screen from the 8903B. I wonder why HP went backwards in foam quality between the A and the B instruments.
MK
