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Forum Index : Microcontroller and PC projects : 9" LCD fault
| Author | Message | ||||
KeepIS Guru  Joined: 13/10/2014 Location: AustraliaPosts: 1679 |
Anyone have an idea for the cause of this fault? It's a 9" screen in 16 bit on a H7, just appeared a few months back and only had time to look at it today. Still usable and touch is perfect, rest of screen is perfect colour. Removed the ARM-H7 pcb, backpack pcb, and 9" adapter pcb, all connections are good, reassembled and still the same. Starting to Look like the LCD. Moving, tapping and twisting boards makes no difference - LCD ram? LH side:  RH side:  . Edited 2024-02-14 14:28 by KeepIS It's all too hard. Mike. |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 4233 |
Hi Mike, Looks like the glass (the LCD) is defective. LCD's like these (unlike the small 16x2 LCD's) have COG (Chip On Glass), so all row and column signals are on the glass. There is no way to repair this. May have been caused (since it is at the edges) by too high pressure on the glass (screws tightening too hard) or as result of temperature (expansion). Anyway, you need a new glass. Volhout Edited 2024-02-14 18:51 by Volhout PicomiteVGA PETSCII ROBOTS |
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| KeepIS Guru Joined: 13/10/2014 Location: AustraliaPosts: 1679 |
Thank you for that info  Well it's still usable, these larger screens are getting expensive now, exchange rate is still stupid, I can live with a few lines on each side of the screen. It's all too hard. Mike. |
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