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v9, can't read discs, but laser is good?
v9, can't read discs, but laser is good? –
Have a v9 system that has not been modded. It cannot read any disc - it just clicks and spins with no results at all.
Thought the laser might have fried, so tried its 400c laser in a v4 system - it worked great.
So what might be the problem? I see some people talking about an LA chip - could that be bad, and where do I buy a replacement? Is there anything else I should check?
Thanks for any info
usually if the la chip fries it takes the laser with it, is this your machine & did it just stop working or did you buy it with this problem, if you bought it like this, it could have been dropped and now the tray height is wrong and you will need to adjust the height. you say it hasnt been modded but has it been opened before.
I tried adjusting the height with no success. I bought it like this (non-working), already opened. Maybe the la chip and laser fried, then the previous owner just bought a new laser for it.. Any other posibilities? Any way to test the la chip with a multimeter?
You need to make sure the lens coils are both good. If they are half shorted (around 2 ohms) as they often are when an LA goes bad, the laser can still function and appear "good" on another station even when it really is damaged. Plus a damaged laser put in a good board can destroy a perfectly good LA/BA driver chip. If both coils are above 4.5 ohms then LA chip is probly good and the problem lies elsewhere, If even one is under then the LA is fried.
I checked both coils and they're at about 4.7ohms. Anything else that might cause this problem? I've taken the board out now and have had a look at it - doesn't look like it's been touched - the la chip and modchip solder points are clean.
Here's specifically what it does:
dvd: drive spins up slowly over and over, after a while will start clicking.
cd: spins extremely fast for 10 seconds or so, then slows down and clicks.
Any parts I might be able to take from a dead v7 system to test out in this v9?
maybe its supposed to have a hd7 laser and not a 400c and you will need to reprogram the eeprom for 400c
Even if it was a HD7 Mobo it would boot up DVD?s after a few spins.
If the Mobo is fine then the problem can only be with the drive components or cables. Make sure the worm gear is moving the laser to the hub before spinning. Check the 2 white cogs under the metal clip at the top, the little holes should both be around the 11 O?clock position. Hub or worm motors could be going bad or have bad cables or partially disconnected cables.
Your best bet is to swap with a V9 drive that you know works. A v7 Drive will not accommodate for the power/eject cable that the V9 needs, and possibly other cable incompatibilities. If the other connectors are the same it might be possible to somehow power up the V9 with a V7 drive, probly by having the V9 drive right beside the board with it's power ribbon connected but it's very short!