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 GMC-320+ boot looping

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T O P I C    R E V I E W
masto Posted - 08/22/2019 : 18:10:05
I have a GMC-320+ V5 that has been hanging on a peg in my basement displaying counts for the past two years. I noticed tonight that it was continuously displaying the startup logo and rebooting. I tried disconnecting power for a while, but it appears to have gone bye-bye. When I plug in USB power, it goes into this boot loop and also makes a squealing sound from the speaker. With the battery installed, it also boot loops (minus the speaker sound).

I presume these are not the symptoms of simply needing a tube replacement. Is there anything worth trying to diagnose or have I gotten all I'm getting out of it? I saw the sticky about measuring voltage, and with a standard multimeter I'm reading 160V on the tube ends when it's plugged in. There are no obvious blown components anywhere.

I do have a fairly extensive electronics workbench, so I can perform tests and repairs, I just don't know where to start. Or if it's worth it given the price of a brand new 500+.
6   L A T E S T    R E P L I E S    (Newest First)
IZ0YAY Posted - 10/13/2022 : 22:50:38
Thanks I replied at you email Thanks for support. Luigi
EmfDev Posted - 10/13/2022 : 09:23:29
Hi IZ0YAY, please try to let the device reboot while connected to USB. It can last for few days if unlucky but after it reboots correctly, please do a factory reset. Then you can email support or me with your serial number to check for updates.
IZ0YAY Posted - 10/09/2022 : 01:58:32
Hello, I have same problem with 320 V4+, any one can help me?
EmfDev Posted - 08/29/2019 : 08:58:24
Hi masto, can you email me your serial number? Thanks.

If you don't have it (unit is in bootloop) I'll need to contact support first.
masto Posted - 08/28/2019 : 17:38:18
Thanks for the reply. It's still goneski, so I'd be up for trying a re-flash
EmfDev Posted - 08/23/2019 : 09:40:31
Hi mastro, something in the configuration has been messed up. Just try letting it boot loop for maybe 1 day? Hopefully it's fixed by then. If it didn't work, (seems like you can do electronics) we can re-flash the firmware.

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