According to Pina, "0000000F" "00000003." the problem is: "The internal hard drive (miniscribe 8425S) has a bad driver map, bad partition signature or bad directory block. He does not list a single error code ending in F besides the drive problem.
The solution is to attach the drives via an external SCSI case. Startup the SE then after the desktop appears, startup the external drive.
Pina indicates there is 50/50 chance of repair by using DiskManager Mac version 2.24 ... there a number of other proceedures depending on what the results of Test Drive yield.
Also, try restarting the SE and when the menu bar reappears, hold down the mouse button which mounts a failed drive. If it fails to mount, but gives you the option to initialize it, click OK.
This is not likely a cap or memory RAM problem. It is a drive or SCSI problem.