Factory reset - done!
Flash Android 2.3 - done!
I had the original Android 2.2 before, so the software is not the reason for my HTC Wildfire display problem.
Display image is moving up/down, the line of notification with signal, battery level..., is going in the middle, bottom of display and so on.... I have a screenshoot and a picture made with a very bad mobile camera, but hope to be enough!
I think few water drops inside 3.5 mm audio jack could be the reason, the warning LED(red one) is not working too.
Had someone the same issue? A way to fix this?