Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

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SiliconClassics
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Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby SiliconClassics » Fri Dec 23, 2016 4:23 am

Please rescue this monitor! It's in very good physical condition and it does work but the screen image is dim.

Someone handy with a soldering iron could probably restore it to full function.

Free pickup in Queens. PM for details.

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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby SiliconClassics » Wed Dec 28, 2016 1:56 am

Gone
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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby foetz » Wed Dec 28, 2016 7:08 am

damn that's pretty much my favorite monitor. why am i always on the wrong continent? :lol:

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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby gijoe77 » Fri Mar 17, 2017 7:36 pm

I literally had 4 of these monitors and maybe 4 of the ones with a remote - forget the model, both SGI and SUN branded. I really regret throwing them into a dumpster. It was late 2000's, I fell off from SGI's/SUNS and they were taking up my entire attic, and I mistakenly thought plasmas/LCD/LED screens were far superior...

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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby SiliconClassics » Thu Mar 23, 2017 9:34 am

For a while CRT screens were totally worthless - couldn't give them away and even thrift stores would refuse to take them. Now it seems as though they're starting to become scarce and collectors are actually willing to pay for working ones.

Probably a good idea to hold on to LCD monitors with analog inputs too, especially if they have S-video / RCA / component jacks. Thrift stores are full of them now, but that won't be the case in another five or ten years.
Last edited by SiliconClassics on Thu Mar 23, 2017 12:57 pm, edited 1 time in total.
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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby Raion-Fox » Thu Mar 23, 2017 12:23 pm

CRTs are great if they're have good quality tubes. in this case I suspect a worn out tube was the cause of it being dim, you can up the intensity of the beam but that just burns it out faster.

I have plans to eventually get a CRT projector and I have a few PVMs and small monitors left. I try to pick up the good ones when I find them but alas I have limited space right now.
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Re: Free: SGI 20" CRT Trinitron Monitor GDM-20E21 - New York

Unread postby robespierre » Thu Mar 23, 2017 12:46 pm

On very old televisions, repair shops sometimes attached devices called "Brighteners" that increased the filament voltage, in order to fix a dim picture. They make the cathode run hotter, which could conceivably shorten its life. But these devices were obsolete by the 1980s when sophisticated rejuvenation equipment became available, and were never a good idea for high-resolution computer displays.
CRT service is a specialized field, and most of the trained technicians are out of the business. Some still do work for casinos because there are still quite a few video slot machines with CRTs.
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