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[Shonk]

I have a friends here thats getting dirty disk error's alot

I cleaned the laser with IsoPropanol

The Laser was 6.16 Default (Liteon)
 
I have never seen one that high

I Tweaked it down to 5.33

Whats peoples experience with lasers that high

[hetster]

benq and liteon are generaly based at around the 5.8 - 6.2 mark anyway. and they go down very quickly. much quicker than samsungs and hitachi's. 1 tiny movement can drop it from 6.0 to 3.0 so be very miniscule with movements and check, check and check again with multimeter. this guide is quite old and written for samsung / hitachi. although the pots are tweaked the same i wouldnt go as low as 2.8 on benq or liteon. rest is as it should be. try in steps of .10 or .20. i know this can be very hard with benq / liteon but you'll be glad you did. 5.2 seems to be a sweet spot for me on the many i have done. once tweaked below 4 the laser seems to die very quickly (1 - 3 months) and needs completely replacing.
also if buying a new laser be sure to find a decent stockist as i have had many lasers from ebay that are broken and if you dont have a lot of experience with them then you will just assume the laser is fine and its the drive as the new laser doesnt work either.

not sure if advertising is allowed. (if not i appologise and please remove from post). i use this seller a lot from UK and have had 50+ lasers from him and only ever had 1 that didnt work, compared to buying 5 from ebay and 4 not working. grrrr.
http://www.console-s...Laser-Benq.html
those work in benq and liteon and very reasonable at £6

[madmackem]

Ok, got a liteon 83850c a0a2, open tray errors so tried calibrating the pot. Initial reading was 4.25 been up a bit and down a bit with no success so ive put it back to 4.25. Now the disc spins but the tray wont eject and the laser doesnt move (lights up tho)
Any Ideas? will a new laser fix it ( what one do i get?) or should I replace the drive and swap the board over - its never been flashed, only plays originals.