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Mustek 1200 III EP undetectable in any image program
In the past, this old scanner has occasionally complained about its
Twain interface after some scanning but would work again after a warm computer restart. The lid-detect function always worked, though I couldn't use it. Now, suddently, using any image program, including the one supplied with it (iPhoto Plus 4, I get the flag "Flatbed scanner not ready", and then, in the case of iPhoto Plus 4, I get "Twain error T009; error opening twain data source T015; unable to find twain source mgr, twain.dll -- copy twain.dll from source disk to Windows folder T039". No dialog window now displays when I open the scanner cover. The illumination lamp is on. All the Twain and Twunk files are in place. I did copy over the twain.dll file from the CD supplied with the scanner. No change. I then uninstalled iPhoto Plus 4 and manually removed all the twain and twunk folders and files, and then reinstalled iPhoto Plus 4, which apparently installs whatever software runs the scanner. I have never found, on my hard drive, whatever the latter is. No change. Since a Mustek tech-support page says says the peripheral configuration mode should be set to EPP, I tried that. No change. The scanner has previously always been used with this mode set to the D850GB motherboard's default, "Bi-directional". Mustek also claims that, given such non-detection of its scanner from an image program, if Windows in Safe Mode does detect the scanner, the problem is a software conflict. In may case, the problem persisted in Safe Mode. Actually, I didn't install any new programs between the time the scanner worked and when it didn't. I also tried running the copy of iPhoto Plus 4 that I had in the contents of my previous HD, which I have existing on my present one. Same symptoms. (That copy of iPhoto was never installed, just copied, onto my present HD. The same resulted from a backup HD I shoved into a module for it on my computer, but only set it as a slave. Same symptoms. I stronly doubt that the optical lid detector (LED-phototransistor sensor) has gone bad. Maybe other hardware in the scanner is bad, but I suspect some silly software problem. Of course, I loosened and reseated the parallel cable, to no avail. The line-lug-mounted power supply for the scanner seems to be at its normal temperature. What could I further check? What files constitute the scanner-driving software anyhow? How would I get Mustek -- US or Taiwan -- to solve this problem on this scanner I bought in 1998? ;-) Hmm. It's still a good scanner. . .once I replace the double-sided sticky tape holding its glass down -- with metal clips held by screws, so that the copy would stay evenly spaced from the scanning piece, even with a heavy book laid on top of it to keep it flat. Ray |
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