Batboard

Hi all,
I have many GP340 VHF and UHF radios that will not switch on. When monitoring the current at switch on some will draw >50ma and quickly fall to 0. Others will only draw <20ma before falling to 0 or sometime 10< ma. Others will draw <35ma and do nothing. So none will switch on, no sound or LED flash. Switch, fuse flexi strip all OK. Has someone got someone know of the issues that cause this sort of fault. Which are the likely components. Any feedback greatly appreicated. Many thanks to you all.

Remove the battery look at the led and switch the radio on.
If the LED flash up,you can try to fix it with the EU Waris Lab Upgradetool.

Andreas