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bibilit

IIgs Screen

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Yep, capacitors associated with the vertical output IC, and the possibility of it being the vertical output IC itself. 

 

Also the flyback is known for seriously bad solder joints and if your missing one of the B+ scan supply rails, it can cause this as well. 

 

A strong smack in the side while on will wraggle that one out. 

Edited by techknight

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Yup, re solder those joints and GET NEW CAPS! They are all only rated to 85c and are all exposed to high temperatures all the time. Those monitors get hot fast...

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I really think it's caps since you've got a partial vertical collapse and can see some of the no startup disk screen (Or something?).

 

On my other thread here there's a cap kit console5 is selling for $15. You get all new name brand caps, along with a peice of candy! Lol.

Edited by Johnnya101

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Then you likely have a failed vertical output IC. 

 

A capacitor CAN cause this, but usually from my experience working on old tube type TVs is when the caps fail in the vertical output stage, it takes the IC with it. 

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