[Elecraft] Kpa500 lcd display issue

[Jack Brindle]

Wayne;

What are you calling  “test pattern”?  There is an LCD test in the system, but it is not available normally, and also not a settable configuration.
Give me more info and I’ll try to diagnose.

73!
Jack, W6FB


> On Apr 13, 2020, at 12:30 PM, Wayne Suite <kd5spx at gmail.com> wrote:
> 
> The lcd on the kpa 500 shows onlty test pattrrn except when I upgraded the
> firmware to version 1.54 from ver 1.38 today during the upgrade the lcu
> showed Mcu Load like it is suposed to do. When done the unit restarted and
> the damn test pattern is back all the time.
> 
> Prior to upgrading thr firmware I suspected the led driver chip U6
> PCF8576DT to be at fault since it has the power on reset function which I
> thought was causing the test pattern, now not so much.
> 
> Anyway it works 100% otherwise just have to monitor it from the pc port.
> All other front panel stuff works I suspect the buttons for the menu pwr
> current and temp work also but I cant tell since the lcd only shows test
> pattern.
> 
> Looking for Don or Wayne to comment I put in an email to the mothership
> yesterday with few details but today much happier I dont have a brick.
> 
> Wayne
> Kd5spx
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