GQ Electronics Technical Support Forum Active Users: / Visits Today:
Highest Active Users:
GQ Electronics Technical Support Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 GQ Electronics Forums
 2.GQ Geiger Muller Counter
 GMC 500+ stops counting when plugged in		  New Topic  Reply to Topic
 Printer Friendly
Author  Topic Next Topic  

mvmaltese66

USA
1 Posts
Posted - 07/13/2025 :  15:35:58  Show Profile  Reply with Quote
GMC 500+ has recently stopped counting when unit is plugged in and powered. It counts with battery power but not when externally powered. Tried 3 different cables, outlets and no change.

NOW it cannot shut off when power button is held down. Have to take battery out.

ALSO realized the clock is now running slow.

Current firmware: 1.12

Any advice?
Edited by - mvmaltese66 on 07/13/2025 15:56:07
Reply #1

EmfDev

2355 Posts
Posted - 07/16/2025 :  13:22:07  Show Profile  Reply with Quote
that is weird. you may need to send it back for service.

also try increasing the tube voltage. or do a factory reset first.
Go to Top of Page
Reply #2

DonaldTerry

USA
1 Posts
Posted - 09/16/2025 :  23:52:52  Show Profile  Reply with Quote
I’m running into multiple issues with my GMC 500+:

It stops counting when plugged into external power (works fine on battery).

Tried different cables/outlets, but no improvement.

Now it won’t shut off when holding the power button—only way is removing the battery.

The internal clock has also started running slow.

Current firmware: 1.12.

Has anyone experienced this before, and could it be a firmware or hardware fault? Any troubleshooting steps or fixes would be appreciated.
https://motox3mgame.org
Go to Top of Page
   Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
GQ Electronics Technical Support Forum © Copyright since 2011 Go To Top Of Page
Generated in 0.06 sec. Snitz's Forums 2000