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GP350 programming issue

Thread starter mbnv992
Start date Jun 21, 2025

mbnv992

Member

Jun 21, 2025

So - found two old school GP350’s today. Odd issue - they both power up fine on a new battery I have. One programs up fine. ( using an older KawaMall Gp350 programming cable the kind that attaches to the back of the radio where the battery goes and you hook up a 9V battery and it plugs into the serial port in the computer, no RIB required ).
The other radio when you hook up the programming battery on the back of the radio - nothing happens. Radio doesn’t turn on at all. No power. I triple checked everything. The 9V battery is brand new, and it works great on all my other GP350’s except this one.
Any ideas on what the issue is ? When the radio is hooked up to a standard battery it works great ( TX and RX too ) but with this programming battery - no power at all to the radio. Very odd.

I even tried to clean the contacts on the back of the radio with a pencil eraser and still no-go.

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