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HELP！DM-5R looks broken
Posted: Sun Jun 11, 2023 11:58 am
by bh4rqx
Oh no!
My DM-5R can't enter the firmware upgrade mode after flashing the GD77 firmware. I pressed the SK1 and SK2 keys, then started up, the green light flashes 4 times, and then it enters normal use mode. Can anyone help me?
Re: HELP！DM-5R looks broken
Posted: Sun Jun 11, 2023 9:19 pm
by VK3KYY
bh4rqx wrote: ↑Sun Jun 11, 2023 11:58 am
Oh no!
My DM-5R can't enter the firmware upgrade mode after flashing the GD77 firmware. I pressed the SK1 and SK2 keys, then started up, the green light flashes 4 times, and then it enters normal use mode. Can anyone help me?
Give more details
Is this the first time you tried to do a firmware update on this radio?
Re: HELP！DM-5R looks broken
Posted: Sun Jun 11, 2023 11:23 pm
by F1RMB
Hi,
Smells like corruption/erasing of the MCU "protection" bytes.
Cheers.
---
Daniel
Re: HELP！DM-5R looks broken
Posted: Tue Jun 13, 2023 10:08 am
by bh4rqx
VK3KYY wrote: ↑Sun Jun 11, 2023 9:19 pm
bh4rqx wrote: ↑Sun Jun 11, 2023 11:58 am
Oh no!
My DM-5R can't enter the firmware upgrade mode after flashing the GD77 firmware. I pressed the SK1 and SK2 keys, then started up, the green light flashes 4 times, and then it enters normal use mode. Can anyone help me?
Give more details
Is this the first time you tried to do a firmware update on this radio?
This is the first time I've flashed firmware on this radio. I suspect that it may be due to flashing the wrong firmware version that has caused the current problem.
Now this radio can write frequencies normally, but it cannot enter firmware flashing mode.
Is it possible to fix?
Thank you for your reply!
Re: HELP！DM-5R looks broken
Posted: Tue Jun 13, 2023 10:11 am
by bh4rqx
F1RMB wrote: ↑Sun Jun 11, 2023 11:23 pm
Hi,
Smells like corruption/erasing of the MCU "protection" bytes.
Cheers.
---
Daniel
Thanks a lot！
Is it possible to restore it to its initial mode?