Liteon LDW-411S Flashing Orange

Hi everyone,

I have a liteon LDW-411S DVD Writer, and i have recently tried
to flash it using the LDW-811S firmware (without success) - Led on drive now just flashes orange.

I have a backup of my origional firmware and EEPROM and have attempted to restore these to the drive.
The drive is recognised by Windows XP as a LDW-411S (FSOF) but the led is still flashing orange and wont read any disks!

Anyone have any ideas how i can get this drive working again?

Hope someone can help…

Rich

After looking into this problem further i have compared
the firware and eeprom backups that i have (from when
the drive was working) to the ones which are now
installed on the drive, and the firmware image is
indentical however the eeprom has one byte at offset
00006F which is different - set to “FE” in the bin image
but on the drive it is set to “37”. Changing this byte with
LTFlash does not work - the byte does not change.

Anyone have any ideas why this byte does not change?
Is there something that im missing?

Rich

Why don’t you use a simple hex editor instead of *flash?
Or is this byte changed backward after flashing?

You can’t change this byte. The drive simply wont allow it. I can’t help you recover since I have no idea how in this case.

1: This byte have to be “FE” for the LDW-411S to work.
2: With a LDW-411S this byte is unchangeable so it should not be possible to mess it up.

This is what I think you may have done: Flashed to LDW-811S - then messed with the EEPROM (idiotic) and then changed this byte to something else than “FE” and thus your drive do not work when you flash back to LDW-411S as this byte is unchangeable…

I do not really have any solutions (you made a really mess) but you may try to flash it to a LDW-811S again - change the byte to FE (if possible - I don’t know if it is possible) and then flash back to LDW-411S and hope that it work.

You messed with stuff that you should not messed with and have to face the consequences :wink:

Thanks for the replys guys…

To answer you questions/comments…

Why don’t you use a simple hex editor instead of *flash?
Or is this byte changed backward after flashing?

Well the bin file that i have has this byte set correctly (FE)
and when writing to the drive all seems ok… but then
when the eeprom data is read back from the drive it’s set
back to 37 !

You can’t change this byte. The drive simply wont allow it.

I’m not so sure about this… the 811S image that i wrote to the
drive has this byte set to “37” so it has changed it correctly in
that case… just seems as though once you change it from “FE”
it cant be set back… I just wondering if theres a jumper or
something that allows this location to be written to, or maybe
it has to be set to some other value to unlock it?

You messed with stuff that you should not messed with and have to face the consequences

I know… i accept that & wouldnt have tried it otherwise. :confused:

Rich

Drive is now working !! :slight_smile:

And i think i’ve sussed what is happening too!

If you flash the drive back to an 811S (which has the byte at
000F6 set to 37), when the drive initalises it sets this byte to FE!

If you flash the drive back to an 411S (which has the byte set to
FE), the drive sets it back to 37 !

But… if you edit the description text in the approrate image and then flash it back to the drive, the drive then sets it to the opposite value (incorrect - or so it thinks!)… then you can just
the falsh the orional version of the image back to the drive and
everthing works fine!

Does that make sence?

Yes it make sense!
And now that you know how to recover how about getting the 811s firmware to run properly on the 411s? :wink:

Can the LDW-411S be sucessfuly updated with the LDW-811S firmware, and thus record at 8X?

Not yet.
Will it ever be possible? Some people say no other say yes.
Time will tell.

And now that you know how to recover how about getting the 811s firmware to run properly on the 411s?

I have tried…

but… when you flash the 811s eeprom there are about 30 or so bytes which get changed back (different from those in the image) which prevents it from working… so it’s not just as simple as flashing the eeprom/firmware, although i do still recon it’s possible.

Now that i know that i can recover my drive to it’s previous state from whatever state it’s in… im prepared to try again if anyone has any ideas…

Rich