The ROM (which you are calling BIOS) is the 8-pin IC directly in the center of your bottom picture with p/n 25xxxx Hopefully you don't plan on using a single soldering iron for this job. If you've got irreplaceable data on this drive and if you're not experienced with working with this type of compo...
Sounds like bad H0 or media damage. I've had cases where a head can read the service area but not data area. Also, heads test runs on locations near/in the service area, not the data area. If it was my case I'd inspect H0 slider under microscope to confirm whether you've got media damage then try a ...
I've had this problem too but just can't remember exactly what the solution was. You might try starting over with DE--creating a new task, new heads map.
datamind wrote:Hi, Is there anybody who bought unlocked WD pcd from drivestar. It costs only 88$. I am interrsted in buying and wonder whether it is reliable.
Yes. If it's the same 800066 I bought for $88 it's legit.
Sure... it will kill the top head... eventually. What do the rest of the sliders look like? If they're clean you can always prevent the top head from touching the platter, image the other heads, and then with a new head stack go for broke on the top head.