[QUOTE=SeÃ¡n;2245410]Going by what you’re describing, it looks like the optical drive itself has developed a problem. If the recorder is still under warranty, I would suggest bringing it back for repair.
As the problem seemed to happen all the sudden, it’s quite possible that something got stuck in the drive mechanism. For example, a hair caught in the tracking could cause it to stick, which would make unusual sounds when trying to read a disc.
I’m not sure whether it contains a separate optical drive unit (like the Lite-On set-top DVD recorders) or if is fully exposed inside the set-box, but if the player is out of warranty and you feel confident to look inside, [B]it would be worth taking off the cover with the disc tray ejected.[/B] Ensure it’s unplugged first! If the optical drive interals are visible (e.g. where you can see the lens and the tray), have a close look at the cogs to make sure there is no lint or hairs trapped. The laser lens should also also be clear. I have fixed someone’s PlayStation 2 console that had lint trapped in the optical pick-up tracking mechanism.
Edit: Have a look at DigaDo’s suggested thread which also goes into detail about cleaning the spindle. I forgot about that thread.[/QUOTE]
With [I]occasional[/I] “no read” “grinding” or “scrubbing” noises or U88/U61 errors, the most likely problem is a DVD Drive rubber hub that is dirty or has oily residue from handling discs through the centre hole. I clean the rubber hubs at six to eight month intervals, more frequently for “heavy use” machines. Other conditions that require frequent rubber hub cleaning are dusty, smoking or warm environments.
I have highlighted the text (above) where there is a suggestion to [I]extend the disc tray with the DVD Drive lid removed.[/I] This procedure may lead to complications that require substantial remedial procedures.
See this post and its links to these remedial procedures, including photographs:
(One must register at the AVS Forum to view the photographs.)