Tray not closing using DVD-r's

[there is light]

Thanks for the reply.
At the moment the laser seems fine it plays movies o.k. even back up movies on DVD-r.
I will take it apart and check the solder points I did it myself over 1 year ago and took my time.
If it is a crap chip whats involved fitting a messiah 2, is it easy and will it work with my PS2 30003 version 4.
Its cost me too much money to stop now
Anybody???