Not too bothered as this only cost me £3, but I just got hold of a Thandar TM351 bench DMM and the batteries have leaked in it. It's a fairly primitive manual range affair but it stacks nicer than the typical handheld DMMs and it's good enough!
Bit of a state inside however thanks to storage problems leading to a leaked set of batteries. It does come up and the ADC is working but it's not reading out anything sensible from the dividers. How best to approach this one?
My plan is:
1. Dismantle.
2. Throw the battery tray in the bin and get a new one. Will run it off the bench supply until I'm sure I can fix it.
3. Remove all CMOS ICs which are socketed anyway.
4. Carefully clean the top and bottom of the board with IPA and a paint brush.
5. Clean the chassis out with soapy water.
6. Reflow all the solder joints.
7. Continuity check all the traces and repair any that are open.
Any other things I need to consider?
All top side components appear to have missed the alien acid bath.
Grim photos: