Depending on what you used to clean off the laser lens, you may well have damaged it to where it's unable to read DVD media. Depending on how much of it you took apart, and how careful you were in doing it, you might have even damaged some of the circuitry.
Since it sounds like you have a "fat" PS2 unit, you might want to consider just using a program like HDLoader. I only recommend its use with games that you actually own. If you have the network adapter for the PS2, you can install a hard drive inside of it (up to 200GB IIRC) and load copies of your game discs onto that hard drive and play them from there. Not all games will work, but there's something like a 95% success rate for games. You'll probably have to use the Independence Exploit, which requires you either have a modchip or someone else with a chipped or exploited system to install the exploit onto a memory card for you. You can then use a program like WinHiiP to load games onto the hard drive.
Again, I only recommend this for games that you actually own, since HDLoader doesn't make any effort to distinguish between games you own and games you may have pirated.
Another option is to get a whole new lens unit from a place like Divineo. If you know which version your console is (there were 10 revisions of the "fat" models IIRC) you might be able to find a replacement lens unit or even a whole new drive. That will probably run you $50-60 if they even have any in stock.
The final option is to just buy a new slim PS2. At about $130, it's only about twice that of the new lens (if my estimates are correct) for a whole new system. Meaning a brand new drive without the years of wear and tear the current one has.
Hi guys and guyesses, I have a really odd one here.
A few months ago, I came to this very forum with my Playstation 2 problem number one: Horrible noises coming from the disk drawer and no disks being read. Over time, the problem seemed to pretty much remedy itself, and before I knew it I was happy again playing games. However, a few weeks afterwards, it went downwards again until eventually nothing would play on it, and the disk drawer sounded like it was going to explode.
I left it a few weeks and declared defeat, until eventually I took it apart and tried to fix it. No go. I did that again today, almost at the point of desperation of not being able to play some games. I managed to get it much further apart this time, and was able to successfully clean the laser. I put it back together, and I put in my favourite game of all time, Duke Nukem 3D. Lo and behold, the game plays, and the disk drawer operates as quietly as anything. The machine operates like new.
But. There is a BIG but here. I put in a PS2 game, and it fails to recognise it. In fact, a few playstation games (and even a DVD movie) will not even register at all, yet my classic PS1 titles, Quake 2, Duke Nukem 3D, etc, work flawlessly. It's as if the machine just doesn't want to read any DVD disks - at all.
To be totally truthful, this isn't a "fix it" post, but rather a "what the hell?!" post. I mainly wanted to put the machine back together to play my classic titles, such as Duke Nukem, and the fact that I can do so makes me very happy indeed, but it is very confusing as to why this is happening. Are my days with this machine numbered?
Perhaps retrogaming is making a comeback... LOL.