Nanao 9070S blinking LED and no picture

[pentium]

I'm building an 486 dream CAD system and because the card I am using has BNC outputs I needed a monitor with BNC inputs. This monitor was found at the university. It has the ability to switch between BNC VGA and TTL/non-TTL EGA, CGA and MDA. It was perfect.
The problem is that I can't get a picture. I switch it on and all I get is a blinking green LED on the front.
Visual inspection shows a yellowed spot on the back where the hot air from the power supply comes out and an internal inspection finds no instantly visible problems or faults. Could it just be dried out caps or what?

[EGuevarae]

Re: Nanao 9070S blinking LED and no picture

Pictures? Brand/series of caps? Any noise with the blinking?

[pentium]

Re: Nanao 9070S blinking LED and no picture

The caps are nippon chemicon.
Also, I left the monitor plugged in and on for a while to heat stress it a little and after a while the led went solid and I got a picture. I switched it off and then on again and it instantly gave me a picture and if I left it off for a while I would have to wait again.
Another problem that might be a little easier to fix is that the color is off in the lower left corner. I'll first move it and if it is still there I'll see if I can somehow degauss the thing.

[Wizard]

Re: Nanao 9070S blinking LED and no picture

definatly the bad capacitors that got bit better when warmed.

Cheers, Wizard

[EGuevarae]

Re: Nanao 9070S blinking LED and no picture

definatly the bad capacitors that got bit better when warmed.

Cheers, Wizard

Agree. I had a similar problem with a Proview that I had to "warm up" to work.
Proview startup delay on cold problem

It must be a bad cap (or caps).The monitor must be rather old ("EGA, CGA and MDA") so even if they are good brand, they might be dry.

[pentium]

Re: Nanao 9070S blinking LED and no picture

I'll have to look them all over some time. In the meantime I have to see what is screwing up the colors. It has to be somewhere on the swivel base as when I turn the screen left and right the colors change.
EDIT: Actually, the monitor was made this month, twenty years ago.

[EGuevarae]

Re: Nanao 9070S blinking LED and no picture

Actually, the monitor was made this month, twenty years ago.

Well, then your monitor is older than my sister.

[370forlife]

Re: Nanao 9070S blinking LED and no picture

You want a free monitor with BNC inputs? I have a 1998 NEC multisync P750, 17", has BNC, D-sub, and a mac connector.

[pentium]

Re: Nanao 9070S blinking LED and no picture

Got no money for shipping right now. This will do for now and it fits in the timestream for the 486-era CAD/CAM box I'm building because I'm bored and have piles of old 486 parts and a copy of AutoCAD 12.