HPI TF-3 TRANSMITTER Don’t work , please help

[Sintetiko]

Hello, I have this ft-3 transmitter and after a while without using it, it does not turn on after placing the new batteries, the red light does not turn on. Do you know where the problem may be? I would greatly appreciate any help, thank you very much

 

[Jabbo]

Are the battery connectors rusty?

 

[J.LO's SAVAGE X]

Clean battery tray from corrosion, and wipe down with wd40 if fixed a scotch brite will clean also with a little oil to help prevent corrosion, otherwise may need new controller

 

[lokky]

Check AA batteries voltage. Check voltage, using multimeter, is reaching from battery to on/off switch to circuit board by following red/black wires, possible on/off switch or battery connector issue.