2400LV stopped functioning while measuring.
Digital part seems to function to the extent that I could even upgrade the firmware to C33 but still no readings, only '----'.
When switching on output it shows +23,977V when measuring voltage, 0,0003A for current and overflow for resistance. Hardly any change when holding leads together (voltage signs changes, current slightly decreases).
All buttons are functioning, reset to factory defaults, communicates (*IDN?, *TST? etc) through GPIB but no readings.
Keithley have a €1800 flat rate which is outside the budget so any suggestion is more than welcome!