bad laser?

[eakinsme]

ok guys.. i got a ps2 i was modding as a favor for a buddy.. i boot it and make sure it works ok and it goes to browser and boots games dvd games and boots cd games b4 getting to teh browser..
i dont think much about this and then i go in and mod it.. reads cd-rs fine but no dvd-rs.. remove the chip and now it wont read dvd format games.. it still reads cd games tho.. i go in and turn the dvd laser pot from 1300-1060 (or around there).. Retry and same thing happens.. no dvd games but all cd games!!

Any ideas? PS: not really wanting to spend much on a new laser since i just got a huge speeding ticket and was doing this as a favor.. the ticket will leave me with about $5 in my bank.. so im looking for cheap solutions!!