Update: So I recently bought a backwards compatible ps3. But it wasn't reading ps2 games so I asked reddit for help and most of the comments said “Replace the Laser Lens,” did
PS3 Slim 2 controllers Values - MAVIN
Firmware 4.83 Is Available for Sony PlayStation 3 Systems - Update Now
DON'T UPDATE Your PS3 Firmware Version To 4.83! (CFW PS3 Only) - YouTube
PS3 System Software 4.83 Update Live, Don't Update Your Firmware! | PSXHAX - PSXHACKS
RARE SONY CONSOLE PlayStation 3 Fat (20Gb) 160 Go Jap (NTSC-J) CFW 4.83 Ferrox EUR 199,00 - PicClick FR
PS3 News: multiMAN 4.85 released coming with support for CFW 4.83 to 4.85 - First update to this highly popular backup manager since the release of FW 4.82! - Wololo.net