Hi,
This reminded me of a funny story i think is worth repeating. It's not really funny though.
Long time ago in the dead of winter my car wouldnt start early morning because the battery was getting old and needed replacement. I took the battery out and brought it in the house for charging. I decided to measure the voltage as it was charging, and bang! Blew out my hundred dollar multi function meter. The meter was set for amps and i forgot to change it back to volts. I usually dont make this kind of mistake but i was in a hurry and got a little too hasty. Needless to say i was very sad about that.
Later that day i checked the meter and everything was still working, except for the amps. It would not measure amps anymore. No reading on any current scale even though everything else worked just fine. I was happy that at least the other functions worked as this was a pretty nice meter, not a common run of the mill 20 dollar meter by any means.
So next i checked the fuse, and it looked good but i replaced it anyway. Still no current measurements. I was very disappointed but i was at least happy that the meter still worked for voltage and frequency and so on. I used the meter this way for some 10 years after that.
Some 10 years later, i was talking with a friend and the subject of meters came up and their display connections. For some reason i decided to take the meter apart so i could inspect the meter display connections to see how they did it in this decent grade meter as opposed to the cheaper 20 dollar meters. I took it apart carefully and checked the display and lo and behold, i found another friggin fuse! The fuse was hiding under a shield so it wasnt obvious even with the meter apart, but because i was inspecting the meter so carefully looking from the side i was able to spot it. All i could think of was, "Wow". The manual said nothing about this secondary fuse so i was a bit upset about that.
Anyway, changing that second fuse and suddenly the current functions all came back into perfect working state. I checked for burnt resistors too but they all looked good and the calibration seemed fine.
What's amazing is that because the manual said nothing about that second fuse i was using the meter for 10 years without knowing i could fix the current functions simply by taking the meter apart and finding that other fuse and replacing it. Not a good manual for sure.