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QMX display unususal problem

#qmx #dispay

Marek SP9TKW All Messages By This Member #142869 Hi All, ? My mid band QMX Rev.2 developed display problem after 4-5 months of good working. Firmware 1_000_027 I build 12V version. ? After switching on all seems ok and works, but after 20-30sec display becomes corrupted. Initially it is just a few letters but soon after that all text is corrupted and gibberish.? When I switch off and on top row is just black boxes.?? ? If I leave radio switched off and detached from battery for day or so and switch it on problem repeats itself again. I mean first it works and then display problems start. I done this couple of times now and each time Initially it works and then after display stops to play a game. ? Connecting to computer through USB works and all diagnostics and LPF/SWR/etc... tests do not show anything unusual. ? Any ideas what's going on? I am not that knowledgeable to sort it out myself. Can you direct me what else I should check?? ? --------------------------------- 73 de Marek SP9TKW
Todd W2TEF All Messages By This Member #142875 Marek, I'm not that knowledgeable either. But it seems to me the primary suspects would be the pins that interconnect the display to the main board. Both the socket and the pins. Are there good solder joints all around, no whiskers or other partial/sporadic shorts? 73 de Todd W2TEF
Marek SP9TKW All Messages By This Member #142891 Hi Todd, ? Connectors were my first call. I resoldered them all again and also tested with display from other QMX I have.? I got the same results. ? --------------------------------- 73 de Marek SP9TKW

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