Hello everyone! I have recently gotten my hands on a broken Fluke 87V (rev.9)
Unfortunately it's currently unusable, as selecting any position with the dial results in the multimeter booting up and displaying the F87 logo, however after that it's only 4 dashes. (I'm linking a video showcasing the fault here ->
https://streamable.com/0c5k3f as well as attaching some pics of the board, just in case you spot something I didn't.)
Holding the AutoHOLD button while turning the DMM turns all LCD segments on just fine, so I assume it isn't an issue with the LCD display itself.
Of course I have tried checking the fuses, replacing the battery, cleaning the PCB with isopropyl, different probes, all to no avail.
I can't see any corrosion(under the rotary dial as well), cracked/cold joints(at least to naked eye), nor any obviously blown components anywhere on the board either - no visual clues so far
Has anyone ever seen anything like this with a F87V? I Would like to fix it, but no idea where to even start troubleshooting this other than the stuff I've already tried.
Of course I have contacted Fluke about this, and was told to contact my local Fluke repair point, but I'm not quite ready to give up (and pay someone else to repair it instead) just yet.
Oh, and I haven't found anything in the manual about this sort of behavior either.
Any ideas what causes this? Or how to fix it up? I'm out of ideas