How do I save Lite-on 16D2S powered backwards

[markieb]

Hello All, My brother gave me an xbox phat for free since he was trying to extract keys from the lite-on 16d2s DVD and he plugged the power in upside down, he let the magic smoke out of the drive and now it does not work. He also DOES NOT HAVE THE KEYS either.  Reading the message board I saw where a replacement mobo for the drive maybe one option to revive the DVD drive, another option mentioned was replacing the MOSFET 1117S18TR as sold by vgcrepairs (hope it is ok to mention them) On their webpage they have a photo of a portion of the drive mobo with corresponding voltages on certain places. I used a voltmeter and came up with 3 places that the voltages did not match what was shown, they were: U7 - lead 2 (center) was 0.17V instead of 1.8v  R207 - the right side has 3.3v as per specs but left side only has 0.76v and C03 only has 0.77v instead of the required 3.3v . All this brings me to the question: will replacing just the U7 chip correct the other voltage problems or do I need the entire motherboard replaced. If the latter is required what needs to be swapped out so I can then get the drive keys from the fried DVD drive? Thanks for taking the time to read and answer my question.

[iateshaggy]

i do emergency key extraction, pm for more details.

[phonsey]

repair the board using this method which will power the drive again to retrieve key just apply the fix and probe with MPX01 with

p.s it can work with a premade probe from team xecuter

hope that helps m8

[iateshaggy]

pretty good diagram for never having never seen his board....

[markieb]

OK, Thanks I'll give it a try tonight. Question... The place you want me to jump (the right side of R207 to C03) both of those points were outputting only 0.76v instead of 3.3v, this not a problem?  I'll also assume that even though the drive will run after this and I extract the keys, this would not be a permanent fix and a new drive or at least new drive motherboard should be installed?

[markieb]

Follow up question: I removed the board to make the instructed repairs as you explained, when I flipped the board over the area where you have marked FIX appears to still be in pristeen condition I see no visible evidence of any burning, raising or any type of damage to that area. What type of repair should I be doing in this area?  Thanks again for the help and answers!!

[iateshaggy]

post a pic of the board

[markieb]

post a pic of the board

My photo skills rival my soldering ability so pardon the mess. please note the jumper wire is not a permanent fix I just want to get the keys, and the bare wires are not touching anything but the 2 points. 




 If you need more photos let me know what you want shot, I'll try my best, the camera doesn't have a very good macro setting.

[iateshaggy]

r207 is a fuse and its blown.  by the looks of it, u can just remove the fuse and replace it with a blob of solder, no need for the jumper wire.

[markieb]

I was sure that something was wrong with R207...... If you read my original post I mentioned that R207 - the right side has 3.3v as per specs but left side (side with the jumper wire) only has 0.76v .  I'll try the solder blob, blobs are within my skill level 

[phonsey]

r207 is a fuse and its blown.  by the looks of it, u can just remove the fuse and replace it with a blob of solder, no need for the jumper wire.

true dat lol