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Hobie-wan
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Re: Monitor is going out of focus. Helllp meeee

by Hobie-wan Fri Feb 24, 2012 2:42 am

dunpeal2064 wrote:Ok, uploaded a nice sideways video, its shitty, but you can see the focus go in and out.


My psychic powers are failing me right now.
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BoringSupreez
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Re: Monitor is going out of focus. Helllp meeee

by BoringSupreez Fri Feb 24, 2012 2:45 am

I had a monitor once that started doing stuff like that. There was no help; it had to be pitched after a while. Better start looking for a new one.
prfsnl_gmr wrote:There is nothing feigned about it. What I wrote is a display of actual moral superiority.
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Majors
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Re: Monitor is going out of focus. Helllp meeee

by Majors Fri Feb 24, 2012 10:54 am

With what I can gather from your 'tronic skillz, I'd say bin it and start looking for a replacement. Craigslist?

Could be a component going bad like a cap or diode, even the power supply. You said you do not see a way to remove the housing and take a look inside? Any TV repair place will charge you more than it's worth, sadly.

It is sad because I had a NEC 4pg 27" beast that rocked for 480p, but I snapped the neck during a transport to a con. I understand your pain. But I didn't pay for it, so easy come, easy go.
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dunpeal2064
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Re: Monitor is going out of focus. Helllp meeee

by dunpeal2064 Fri Feb 24, 2012 11:15 am

Damn, such a shame. I've been spending so much time gathering the accessories to hook my consoles up to this beast via RGB and VGA, and it seems unlikely I'll find another CRT with RGB hookups anytime soon.

Thanks for the help though guys. I have to do some thinking about where I want to go next. I may just sell half my stuff and buy a candy cab or something.
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CRTGAMER
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Re: Monitor is going out of focus. Helllp meeee

by CRTGAMER Fri Feb 24, 2012 1:29 pm

The adjustments mentioned earlier does not cost anything to do, why not try it? It probably will not help, but you never know.
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dunpeal2064
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Re: Monitor is going out of focus. Helllp meeee

by dunpeal2064 Fri Feb 24, 2012 1:35 pm

It seems worth trying, I'm just worried about it, never opened up a tv.

Shit, better than not tryn at all though. I,ll try it tonight.

Should I power on the tube when adjusting the knob?
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CRTGAMER
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Re: Monitor is going out of focus. Helllp meeee

by CRTGAMER Fri Feb 24, 2012 1:57 pm

dunpeal2064 wrote:It seems worth trying, I'm just worried about it, never opened up a tv.

Shit, better than not tryn at all though. I,ll try it tonight.

Should I power on the tube when adjusting the knob?

Yes. Just be careful as mentioned earlier, VERY HIGH VOLTAGE around the back of the tube and the fat wire from the CRT to the Flyback Transformer. The Focus Potentiometer is usually on that box looking device.

The risk is small as long as you watch where you put your hands and screwdriver, ideally a "plastic" tuning screwdriver is the best way. A jewelers screwdriver will work just be careful not to short out anything. Go in small increments when turning a pot, remember where you start from.

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Usually there will be a bank of Potentiometers inside.Image


The Focus Pot is normally on the Flyback Transformer box like this. The fat wire cup goes to the CRT.
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dunpeal2064
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Re: Monitor is going out of focus. Helllp meeee

by dunpeal2064 Fri Feb 24, 2012 2:31 pm

Extreamly helpful, I feel much safer attempting this now.

Thank you much CRTGamer.
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Hobie-wan
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Re: Monitor is going out of focus. Helllp meeee

by Hobie-wan Fri Feb 24, 2012 2:41 pm

Ok, now that the video is there, I think it is less likely just a corroded spot on the focus adjustment since that is smoothly bouncing in and out of focus instead of quickly snapping in and out. But if you can carefully get to it, worth tweaking to try anyway. Unfortunately I agree with Majors, if it is more than a dirty adjuster, it is likely going to be expensive to fix. :(
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ChuChu Flamingo
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Re: Monitor is going out of focus. Helllp meeee

by ChuChu Flamingo Fri Feb 24, 2012 2:43 pm

If these suggestions don't work, I still wouldn't throw it out. 37" NEC Multi-sync xp-37 plus are pretty hard to find.

I would go on the avs forums

http://www.avsforum.com/avs-vb/forumdisplay.php?f=64

specifically the member neccrttv

He has fixed a lot of CRTs and might know what is wrong with this one.

best of luck
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