XL 340S Screen Problem

[Meista]

So, I use my unit a lot for work. That said, the recent summer months have lent a lot of heat on the unit; it always sits on my dash.

Lately the screen has been a problem. Every key must be touched about halfway down of its original position on the screen. So, I have trouble pushing the space bar (at the bottom), or every time I try to go back, the screen will register the letter 'm', which is the key directly above it. I wonder if heat has ruined the unit.

I've seen some chatter about SD cards and updates. I can tell you I did the most recent update a few months ago:
App: 9.465.1074274.2
OS: 842337
GPS v1.20
Boot 5.5136

Any help? I don't see an SD card, probably why it was more affordable. I'm prepared to calibrate, I just don't know how. I've also considered resetting to factory, but I'm a bit hesitant.

Any help is much appreciated.

 

[canderson]

Do a quick search here for the word 'calibration' and you'll find a couple of fairly recent ones that deal with creating the file necessary to shift your screen back up a bit. I've had that happen to my 740 over time, too.

Here's a good starting point: https://www.tomtomforums.com/threads/screen-re-calibration.29230/

 

[dhn]

Here's one:

https://www.tomtomforums.com/threads/screen-re-calibration.29230/#post171227

 

[canderson]

That looks familiar