I bought a 7" LCD for the Latte Panda and if I connect it to the LP before power up it displays only random vertical lines.
I assumed it was faulty, so a second one arrived (so now I have 2) and both do the same thing.
If I disconnect the ribbon cable, power up the LP and THEN connect the LCD they both work fine.
What could the problem be and how can I fix it?
LCD not working unless connected AFTER power-up
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- Hardware issues that weren’t caused by you, e.g DOA board
- Windows 10 specific issues
- Discussion tone should be kept polite and focused on facts
- Vulgar language or flaming constitutes an instant ban
- Please note we cannot support PM requests for help
- Members are asked to post in English only so that posts can be well received and properly monitored
- You can find the RMA guide [here]
- Please check if your question has already been answered before opening a new thread. If it has not, please verify the following:
- Have you tried a hard reset?
- Are you using a 5V@2A+ power supply and a high quality USB cable?
- Have you tried powering the board through the CN2 headers?
- Have you tried a cooling solution such as a fan or heatsink?
- Have you tried reinstalling drivers?
- Have you tried reloading the operating system?
- Have you tried flashing the BIOS?
- Are you able to flash the BIOS at the hardware level?
If you have not found a solution, post a new issue. To speed up the process please let us know:
- Have you tried the solutions listed above?
- What board are you using? Standard (2GB RAM/32GB eMMC) or Enhanced (4GB RAM/64GB eMMC)?
- Have you tried any other solutions?
- How long have you had your board for?
- When did you first boot your board?
- Did it work ok before the issue occurred or has the issue always been there?
- Use images and videos to help us understand the issue where possible
If you are seeking RMA:
- Please open a new topic rather than hijacking someone else's thread
- Mark RMA posts with [DEFECTIVE] + <helpful description of issue>. We can then approve/disapprove each request
- Completed RMA cases will be marked with [CLOSED]
You can find the RMA guide [here]
Resolved Issues
- If you manage to fix an issue, please share your solution for the good of the community. It could help someone else in future.
- If an issue is resolved the thread should be marked as [RESOLVED]. We can then sticky the thread to help people in future.
What does troubleshooting support?
- Hardware queries
- Hardware issues that weren’t caused by you, e.g DOA board
- Windows 10 specific issues
I have exactly the same problem. I had an old display which worked fine. It was bought in 2016 or 2017. Unfortunately the cable broke. Now I bought a new one which has a connection cable that is different from the one I had before. It works fine if I do like you described. After booting I have to open and close the connector. Then it works. It shows grey lines also after the Lattepanda has gone to sleep. My LP 2/32 w windows 10 activated is one of the first they sold. Updating the intel graphics driver did not help. I guess there is a wrong bios setting regarding the power management of the display. Maybe a firmware update of the LP would help. But I won't do this unless they advice me to do so
