Like the BenQ 8700+ and an ATI video card, I have ended up with a corrupted EDID on my BenQ W1000. For reference, this problem manifests itself as not being able to see detect the projector with the PC, XBox360 Elite reverts to 640x480, and AppleTV has problem syncing. Note that a DVD player (Denon 2910) and DirecTivo (HR10-250) are fine, because they don't bother to read the EDID. This also shows up in the System Log (from Event Viewer) as "edid checksum error" logged by source "ati2mtag"

I have read all the issues other people have had with this over here:
http://www.avsforum.com/avs-vb/showthread.php?t=656032&highlight=benq+edid

After having dusted off an old USB floppy drive, sacrificed an old Windows95 Setup floppy, and hauled the editing workstation with Nvidia boards (the HTPC is ATI) into the theater room and hooked it all up so I can run EDID Writer (Nvidia compatible only), I now have a dump of my corrupted EDID.

What I need from someone is a dump of their good EDID info from a W10000, although a W9000 will probably work as well. I'm pretty sure the first (and hopefully only) issue is a corruption of the first byte, which should be 0x00, but is 0x50 (the first bunch of bytes are a predefined EDID header, and should never change).

Dumps can be done with Powerstrip and other tools mentioned in the above thread.

If I get this back to working, I'll dump mine here for future reference.

Thanks in advance.

Well, I carefully typed the stuff I got from EDID Writer into the EDID tool from Viewsonic (to verify if lots of data is goofy, or just a bit), and based on the checksum in what I dumped, it looks like there was only the one error in the first byte (0x50 instead of 0x00)

Having fixed this with EDID Writer ("ddcw -m 1 -p"), my Apple TV seems happy now, and the HTPC with the ATI card (soon to be banished) is working too!

For reference, my EDID is:


128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 09 D1
10 | 01 84 3A 00 00 00 09 11 01 03
20 | 80 00 00 78 2A 5F 9F A9 55 50
30 | 92 24 0D 4A 4B A5 4A 00 61 59
40 | D1 C0 01 01 01 01 01 01 01 01
50 | 01 01 01 01 02 3A 80 18 71 38
60 | 2D 40 58 2C 45 00 00 00 00 00
70 | 00 1E 00 00 00 FD 00 30 58 18
80 | 51 0F 00 0A 20 20 20 20 20 20
90 | 00 00 00 FE 00 42 65 6E 51 0A
100 | 20 20 20 20 20 20 20 20 00 00
110 | 00 FC 00 57 31 30 30 30 30 0A
120 | 20 20 20 20 20 20 01 2E


The complete file from the Viewsonic EDID program is below. Note that the serial number and manufacturing information is unique to my projector, so the values in the second line
3A 00 00 00 09 11
represent my serial number (00058) and manufacture during week 9 of 2007, so these values will be different for someone else's W10000.

If this ever happens to you, feel free to message me to get help.