Judging by your picture, the text can be read if desired. Therefore, if I were you (provided that HW has not passed the warranty period), I would get access to the wallet, if there is crypto there, and send it to another address. Or, if seed-phrase is saved, then would simply restore the device to factory settings. After that, I would send it to the manufacturer for a replacement, if Ledger require it.
It does appear sometimes like this. Had anyone experienced similar issue? What is most funny (strange) that you can not see it all the time one day works fine - and another day like this. What do you suggest me to do? Wait until Ledger support service wake up? I have already contact them a week ago and no one is really willing to help.
You say you contacted support a week ago? This is rather unusual, as some users here have claimed that Ledger has no problems with the support department and responds fairly quickly. Unless the delay is due to the fact that the support does not have time to process applications due to the large number of returns of defective devices.
Wait for their response and don't panic. After that, act on the proposed solutions that Ledger's support will tell you.
https://www.ledger.com/reseller - you can search for your importer among dealers.
They are telling me that they have no choice othat than shipping it back to ledger for repair!! Which is not really good...
Who is speaking? Ledger or your importer? If Ledger suggests sending the device back to the factory, then why not do so (if it doesn't create any trouble for you). So you can get a new and working device.
I really do not wait for so long that they ship it back to France for replacement etc - and I prefer to have it repaired by myself. Any suggestion is appreciated.
Do you think that I can simply open it and try to repair it myself???
It's up to you to decide what to do here. If you are sure that you can handle the replacement of the display, then why not give it a try.
But all of the above makes me think that the best option for you is to send HW for a replacement so as not to complicate your life. Why? If you are asking questions of a similar nature as above, then I doubt that you can handle it.