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NanoVNA H FW 1.0.53 Display Intermittent

 

Have an old NanoVNA H with the above FW whose display is intermittent. More specifically, the menu turns off and on or will revert to the main menu.

I have tried to do the touch cal and touch test with no success. Appreciate any remarks on the subject; resetting the unit, etc.

Thanks in advance.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
 

William,
This might be due to the case pressing on the touchscreen
Try loosening the mounting screws or perhaps adding thin washers for spacing.
--John Gord

On Thu, Apr 3, 2025 at 10:29 AM, k6whp wrote:


Have an old NanoVNA H with the above FW whose display is intermittent. More
specifically, the menu turns off and on or will revert to the main menu.

I have tried to do the touch cal and touch test with no success. Appreciate
any remarks on the subject; resetting the unit, etc.

Thanks in advance.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
 

William,
Also check for battery swelling causing pressure on the display.
--John Gord

On Thu, Apr 3, 2025 at 10:29 AM, k6whp wrote:


Have an old NanoVNA H with the above FW whose display is intermittent. More
specifically, the menu turns off and on or will revert to the main menu.

I have tried to do the touch cal and touch test with no success. Appreciate
any remarks on the subject; resetting the unit, etc.

Thanks in advance.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
 

John,

Thank you for your advice; I think that is the reason for the fault.

I tried that and operated the unit outside of the case and it seemed to work a little better but the menu still flickered and jittered. I also noted that, after a full charge, the battery discharged rapidly -- after about 10 minutes of use. Apologize for not searching the group for an answer, but what battery could be used and how would it be replaced?

Thank you again.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
 

I have this problem even with my recently purchased NanoVNA. Sometimes when
I switch on, the screen is blank. If I switch off and switch on once again,
usually it becomes OK. The problem recurs again during the next power on
sometimes. Occasionally I have to switch on and off a couple of times or
more to get the screen visible.

Otherwise there is no problem with the functioning of the NanoVNA. Battery
gives good charge retention.

73
Jon, VU2JO

On Thu, Apr 3, 2025 at 10:59?PM k6whp via groups.io <k6whp=
[email protected]> wrote:

Have an old NanoVNA H with the above FW whose display is intermittent.
More specifically, the menu turns off and on or will revert to the main
menu.

I have tried to do the touch cal and touch test with no success.
Appreciate any remarks on the subject; resetting the unit, etc.

Thanks in advance.
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."

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