V7 can't read CD's (DRE). Can read DVD games and movies.
My unmodded V7 won't read original CD games or CD audio but can handle original DVD-games and movies without problems. It has a KHS-400C laser assembly.
Things I've done so far:
1. Cleaned the lens.
2. Cleaned under the lens.
3. Cleaned the secondary element under the top lens.
4. Adjusted CD-pot from 1500ohms to 1000ohms including various places in between. No difference.
5. Adjusted white "cog" for laser assembly height. No help.
6. Measured the coil resistances (~5ohms for both).
Audio CDs and blue-backed games get the dreaded "DRE" after hearing a fair amount of "clicking". Laser head is slamming back and forth it seems. Some audio CD's seem to try to spin-up before eventually stopping. Other CDs don't spin up at all. Again with the "clicking".
My gut feeling is that the CD laser element is shot, but I'd like to make sure I didn't miss something before i go and buy another laser. Are there fuses I should check?
The particular unit I received from a friend who botched a MOD chip install. I repaired it to the best of my ability. I needed to jumper a pulverized trace on a few mashed pins on that 4-side IC (SP2537?) near the main CD/DVD drive ribbon connector. Could this chip be blown?
If I do buy another laser, what else should I replace to make sure this doesn't happen again? The BA chip?