Unsolved the battery and see if it runs when connected by USB. Sometimes, a dead liion battery will prevent the inverter from starting up.?
On Wed., 24 Feb. 2021 at 4:47 p.m., Charlie N2MHS via groups.io<ucfargis1@...> wrote: Not to be offensive but have verified 3 volt and 5 volt power? LEDs lit>
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On Wednesday, February 24, 2021, 3:07:08 PM EST, VE2DX <ve2dx@...> wrote:
ok!...? Let me be clear...? the unit was NOT loaded with -H4 firmware...
The unit was sitting on a shelf for a couple of months and when I pulled it out to use it it was...? DEAD... Bricked... NOT WORKING... call ot as you wish it stopped working by itself not because I load -H4 firmware in it...
I tried running the DFU procedure and can not detect the unit, and yes I did follow the process to get the unit in DFU mode holding the Select switch while powering up, tried in all 3 possible position...
No I do not see any Jumplers on the pcb
I got myself an ST-Link V2 from Amazon, and I am simply looking for;
1- Software to download firmware in NanoVNA-H (Not using DFU!)
2- Proper site do download latest NanoVNA-H Firmware HEX file.
3- good site for step by step of the procedure
thanks for the help
73
Richard VE2DX
