I have an old Socket 7 computer with FIC PA-2007 motherboard connected to an Acer 1208A CD-writer. A few weeks ago this drive started to blink its status light and turn its spindle motor on and off, and an identical 1208A (same 9.CC firmware) behaved exactly the same. This stops when the drive cable is disconnected. All other CD writers work fine with this motherboard, and both 1208As work fine with every other motherboard.
I’ve changed cables (CD writer on its own cable), master/slave jumper settings, and power supplies, but the 1208As still act up, and only in the PA-2007 system.
I rule out viruses or interfering software because the 1208As behave badly even when I boot from a floppy with no hard drive in the system. I’ve even re-flashed the motherboard BIOS, including its boot block.
The other drives I’ve tried include a Lite-On LTR-32123S, three 48-52X BenQs, and old Toshiba and Sony CD-ROMs.
The other motherboards range from a fairly new Sempron64 with nForce3 chipset to some that are even older than the PA-2007, including a 100 MHz 486.
I’ve measured voltages with a meter at the points of load, and all voltages are within 2% of nominal values.
I know that CD writers are cheap, and I don’t really need this PA-2007 motherboard, but I want to know what’s causing the drives to act funny with it, especially when the problem started only a month ago.