Hi, first of all excuse me for my english.
I have an OEM Lite-on DRW 1s45 (I suppose), then I crossflashed it to @451s
and finally @832s. It seems ok but I took several error and no burn at all.
Then I tried to go back but I flashed with a wrong firmware of 1s41!!!
What can I do??
thanks in advance, Enrico
Welcome to cdfreaks 
Is the drive dead? If so you’ll need to use MTKFlash to restore it. See this site:
http://dhc014.rpc1.org/howto.htm
thanks for your replay…
my drive was dead but visible by Windows, with Firmware Flashing Tool (update boot code, update) I flashed using a binary firmware of 451s (I got only a .exe firmware of my 1s45). The burner seemed good and I tried burning a cd…wow it’s ok…but every time I try to play the file on the cd windows crashed. After this my burner is visible only during the boot no in windows. So, I tried either mtkwinflash and mtkflash in DOS but without success.
HELP!!
Mtkwinflash : “ERR. fail to identify the flash type”
sorry for my poor english
Just solved my mistake :-)!!!
I tried again with mtkflash 1.83c and a correct binary firmware, it work fine
an finally my dvd burner is still alive
thanks to this forum and all users
Except with a sledgehammer, or by corrupting the EEPROM with no backup!
It seems very rare not to be able to reach it with MTKFLASH - port mode… just be careful with such powerful tools, not to add another casualty …