AppleColor composite monitor IIe discoloration on the corners

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AppleColor composite monitor IIe discoloration on the corners

Postby Windows9566 » 2019-1-14 @ 04:41

Image

I just got a AppleColor composite monitor IIe for my Apple IIe, it works but has discoloration on the upper left corner (yellow splotch on the upper left) and lower right corner (blue splotch on lower right)
any way to fix it? or is it there forever.
DOS PC - Intel Adv/ML Marl, Pentium 133 P54C, 32 MB RAM, S3 Trio 64V+ 2MB, 20gb HDD and CF card, Gotek Floppy Emulator, Win95 OSR2.1
Win 98 PC - ASUS P2B, P3 500 MHz Katmai, 256 MB RAM, Geforce2 MX 400 64MB, 3dfx Voodoo 2 SLI, 40GB Hard Drive, Win98 SE
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Re: AppleColor composite monitor IIe discoloration on the corners

Postby Tiido » 2019-1-14 @ 09:54

Degaussing operation after power on (that thunk sound) should fix such things. This is caused by magnetization of the mask in the screen or nearby magnetic field (i.e from non shielded speakers). Sometimes you need to power on the monitor several times (with few minute breaks) to fix that. Also changing positioning of the monitor while it is running can cause this, in which case another degauss operation is likely needed though effects of that should be far more subtle.
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Re: AppleColor composite monitor IIe discoloration on the corners

Postby sf78 » 2019-1-14 @ 12:49

You could also take a risk and use a strong magnet on the case and swipe back from the front side of the case (where the discoloration appears) to the rear where the tube ends. I have fixed a couple of TV's with this method, but it might require a few tries and you might experience stronger discoloring at first. Also, I don't take any responsibility if you make it worse, but if it's already ruined then what's the harm?
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