Hello Oli,
I experienced the same and contacted Elecraft support. They suggested re-heat
the solder of U6 and U11 in the front panel to eliminate cold solder joins.
However, my eye sight and hands are not good enough to do so. I simply leave
as it is because the LCD characters usually come back after 5-10 mins power on.
May I know the serial no of KPA500? I suspect there could be a small patch of
KPA500 with front panel minor defects.
73
Johnny VR2XMC
寄件人︰ "Oli, DL1OLI" <[email protected]>
收件人︰ "[email protected]" <[email protected]>
傳送日期︰ 2016年06月14日 (週二) 1:20 AM
主題︰ [Elecraft] KPA500 LCD-Display mysterious failure
Dear Elecraft-list,
today I powered my KPA500 #1584 up and got no display on the KPA500. The
backlight is working properly but the LCD shows nothing.
The Amp is working OK, it communicates with the KPA500 Remote utility, it
communicates with the K3 and does 500 W Output as before. Only the LCD shows
nothing.
Even the keys for Menu and the bandkeys are working fine.
After some time, after I removed it from power complete several times, opening
the top Cover, controlling remote, flashing new firmware ect. the LCD is
mysteriously working again.
Any tips to this? What to check for? Thank you.
vy 73 Oli
DL1OLI/AJ4UR
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