DVD Writer can't detect Disc when inserted & it's not bootable anymore

[Geej]

Ever encounter this problem? I'm unable to determine root cause...

I thought could be my DVD writer defective. So I swop with a spare CD writer (working one). No luck.

Change out IDE ribbon cable. Still no luck

Under Device Manager, everything ok.

Can even eject thru the Windows context menu in Window Explorer.

I suspect MB defective but do not know how to check.

Any suggestion?

As I'm Slipstreaming XP Pro thru HFslip, I'm unable to test my build.

[Geej]

Just to share...

My MB is defective (a few capacitors corroded), DVD-drive defective & system fan performance intermittent.

Sent PC to workshop, ask me to change out MB & DVD drive. Done.

Bring back PC. Can power up for 1 day.

Next day, cannot startup at all. No power to the PC. I wonder why. Bring the PC to same workshop and was told PC went into thermo-protection. Now PSU, CPU & MB also dead.

In the end, change again PSU + CPU + MB + RAM + system fan. Now working fine.

Now looking back, if system fan has been changed at the first instance, maybe my Cpu will not get into thermo-protection state.