MPI 22 Monitor Heater

[jsans1012]

My Monitor has stopped working...no flashing, no lights...nothing
Been sitting for a couple of years...had flashing light previously, but nothing now. Checked the PCB board and the RL1 has a black spot on the top of it, could this be the problem??? Have been reading all the post for Monitor and I hope you can help me. I noticed there is a place that repairs the boards but would like to try maybe fuses or something if you think it would help. Thanks in advance.
J Sans

[HayZee518]

are you familiar with troubleshooting with a meter? If YES then take voltage checks on the MB. If not then get a service person over there.

[jsans1012]

Monitor MPI 22

Hi,
Got it to the turn on almost start then flashing lights???
Also noticed that I cannot set time/temp....have room temp 56/42 and clock time but nothing else...checked the large pcb and everthing checked ok...would it have anything to do with the smaller power boards? Have a run light but the auto light does not work either??? Suggestions please!
Got the original owner's manual but I don't find it to be of too much help. Have a copy of a Monitor Heating Systems Service Manual but many pages are missing 6, 8, 10, 19, 29 also 32-40 and 41-57 is there anywhere I can get these?
I'm ready to tear it down and rebuild but need to locate parts too....it seems to be one of the oldest models.
Thank you for your time...

[HayZee518]

an open thermistor defaults to 42 when it is open. check the thermister. a thermistor changes its value when temperature goes up or down. check the path from the board through the air proving switch. hawkins111 put up a reference to many monitor parts lists. go back into the threads and find it.