PDA

View Full Version : DVD drive lens melted!



Agent_24
29-06-2008, 06:56 PM
I just tried to boot a linux live CD, I put in the DVD-ROM drive (Cyberdrive DM168D) but it wouldn't boot. Being about 6 years old I figured the chances of there being dust on the lens would be pretty high, so I thought I'd clean it.

Pulled it out cracked it open (voiding my 5 year expired warranty in the process :D - I surprised myself that I had something that old which still had an intact sticker!). I noticed what I thought was a LOT of stuff stuck to the lens - only it wouldn't wipe off... then I realised that it WAS the lens (or what was left of it!)

It looks like this now: http://www.imagef1.net.nz/files/tmpphp35NQmh.jpg

and here's my laptop drive for comparison: http://www.imagef1.net.nz/files/tmpphpgDd13B.jpg

Don't know what happened to my DVD drive but I powered it up and it flashed red, so the laser still appears to be working...

I've opened/cleaned/repaired a lot of drives and never seen anything like this.
Anyone know what might have caused this? Overheating? power surge? laser malfunction? I'm worried that a replacement might end up the same way :horrified

zqwerty
29-06-2008, 07:36 PM
Maybe solvent damage, what have you used in the past to clean it or disks.

Forgot you said you had never opened case before so maybe current limiting on the laser has failed and overheated the lens. Never heard of or seen this before.

Agent_24
29-06-2008, 07:51 PM
Maybe solvent damage, what have you used in the past to clean it or disks.

Forgot you said you had never opened case before so maybe current limiting on the laser has failed and overheated the lens. Never heard of or seen this before.

I only use isopropyl alcohol to clean lenses, but I had never cleaned this drive before.

I thought maybe the laser caused this too, but I think the laser would burn out quickly if this did ocurr, and the laser does still appear to work.

Graham L
30-06-2008, 05:02 PM
I hope you didn't look straight into the laser beam. :( The visible red light is normally very faint: most of the energy is invisible and that is concentrated enough to damage your retina.

Has someone played with a "cleaning" disk, using something like meths? But even that would merely (:)) make the plastic lens translucent. Is what's left of the lens sticky?

Is the drive one of the "lightscribe" ones? I suppose one of those might damage the lens if it was trying to etch a disk without the paint surface, and was copping a reflected beam.

Jayess64
30-06-2008, 05:56 PM
Being about 6 years old I figured the chances of there being dust on the lens would be pretty high, so I thought I'd clean it.



I think you did very well for a 6-year old

Agent_24
30-06-2008, 06:21 PM
I hope you didn't look straight into the laser beam. :( The visible red light is normally very faint: most of the energy is invisible and that is concentrated enough to damage your retina.

No, looked at it side-on following precautions from (http://www.repairfaq.org/sam/cdfaq.htm#cdsaf) - besides I don't think anything is going to get through that lens very well considering the state it's in.


Has someone played with a "cleaning" disk, using something like meths? But even that would merely (:)) make the plastic lens translucent. Is what's left of the lens sticky?

Never had a clean in it's life - that's why I thought dirt was the problem to begin with. Not sticky at all, it's solid and rough.


Is the drive one of the "lightscribe" ones? I suppose one of those might damage the lens if it was trying to etch a disk without the paint surface, and was copping a reflected beam.

It's a DVD-ROM, doesn't write anything. Don't think they even had lightscribe 6 years ago.


I think you did very well for a 6-year old

The drive is about 6 years old... not me! :illogical

Agent_24
30-06-2008, 06:47 PM
Here's another photo, this time done with a scanner: http://www.imagef1.net.nz/files/Image4.jpg