PS2 Laser doesn't work Helppp!! I will pay money

I have a Version 9 or 10 PS2 with a Matrix Infinity Modchip (Not sure if its Genuine or not).
A week ago I suddenly was not able to play backups or run my Independent Exploit CD but it was still able to load Original Cd, DVDs and movies.
Someone told me that one of the wires must have come loose inside the PS.
So i decided to open up my PS2 even though originally I sent out the PS2 to get modded. I opened up following some instructions online then after it was opened up I realized that the instructions were for an earlier version of the PS2 I continued on anyway came to the Metal shield covering the Mainboard and I was not able to remove one of the precision screws and the fan connecter plug.I also wiped down the laser with alcohol and wiped it dry. So long story short I put it all back to together and now it wont play CD's or DVD's??????:wow:

If there is anyone on here that is willing to troubleshoot
I will pay for it to be mailed out and let me know your prices

I just wanna be able to use the Matrix Infinity Modchip
And also have the exploit on the Modchip or the HDD whichever is easier.