Vista Forums - View Single Post - vista explorer and how it makes you a friend

**Dwarf** · 11-21-2008

Hi Vance,

Is the optical drive recognised by your BIOS? Check the POST screen when you boot up. Does this display the drive and detect the manufacturer/model number? Enter your BIOS and check that the transfer rate of your drive is set to DMA or Auto and not PIO mode. Don't forget to exit saving changes if any alterations are made. If all this checks out, go into Device Manager and check the transfer rates there. You will probably need to restart for changes to take effect. Another thing to check is the security of the cables - make sure that they are inserted firmly and correctly orientated. Another possibility could be your PSU. To quickly check this, enter your BIOS and go to the System Health page. Watch the voltages as you operate the optical drive (insert a disc). It is normal for the voltages to fluctuate slightly, but any excess drop in voltage, particularly on the 12V line, could indicate possible problems either with your PSU and/or your drive, in which case I would agree with John that it is a hardware issue.

11-21-2008	#5 (permalink)
Dwarf Vista Home Premium 32-bit & Vista Ultimate 64-bit both Service Pack 2 W7 Pro RTM 7600 32 & 64 2,180 posts	Re: vista explorer and how it makes you a friend Hi Vance, Is the optical drive recognised by your BIOS? Check the POST screen when you boot up. Does this display the drive and detect the manufacturer/model number? Enter your BIOS and check that the transfer rate of your drive is set to DMA or Auto and not PIO mode. Don't forget to exit saving changes if any alterations are made. If all this checks out, go into Device Manager and check the transfer rates there. You will probably need to restart for changes to take effect. Another thing to check is the security of the cables - make sure that they are inserted firmly and correctly orientated. Another possibility could be your PSU. To quickly check this, enter your BIOS and go to the System Health page. Watch the voltages as you operate the optical drive (insert a disc). It is normal for the voltages to fluctuate slightly, but any excess drop in voltage, particularly on the 12V line, could indicate possible problems either with your PSU and/or your drive, in which case I would agree with John that it is a hardware issue.
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