We have a 5977 MSD which came up with two errors following a site power outage:
"Source Heater Error: Timeout - temperature fails to increase under full power."
"Analyser Heater Error: Timeout - temperature fails to increase under full power."
We've seen something similar before and needed to replace the fuses inside the left compartment but I've checked and these appear to be OK (they look OK and they test for continuity on a meter). I checked the main fuses on the back too for the sake of being thorough but the MS powers up OK and they're also good. I also checked both the source heater and the quad heater's for continuity too and they both ready OK. I'm not sure what kind of resistance to expect on the temperature sensors but all the wiring looks OK.
Is it possible the left side fuses look and test OK but are still damaged? Likewise for the heater cartridge for the source? Or, is it more likely to be the main board... (eeek!)
Any help would be greatly appreciated.