Temperature shows 0

good day!
I have a problem. the printer worked fine. stopped working today. I began to understand why and the only problem, the temperature of the extruder and bed shows 0. wires are intact, I checked. how to solve this problem??? esteemed instructions there to enter M999 wrote, but I did not understand where and how. I would appreciate some help.
I would appreciate an answer in Russian :)))

Sorry I’m not Russian.
Maybe the NTC thermistor break down. Check the value that it reads about 100 Ohm with an envoirement temperature of around 20 degrees Celcius.

I checked … at an air temperature of 25 Celsius resistance extruder 105K and 96K resistance bed. but as far as the correct readings?

Maybe an USB connectionproblem. Disconnect the USB cable from the PC and reconnect it.

I already tried and disconnect the power. temperature is equal to 0., and do not burn all the lights on the board. if you turn the power off then start to burn the bulb. What else can I check??? I read all that can be done, but nothing helps (((

If you swap therm1 and therm2 does the error move?

thanks for the answer. But the problem was solved by reinstalling repetier host. I can not explain. but after all the checks have been changes, I removed and installed a new program, there was some newer version. and it worked.