Optiquest Q7 Power Supply

[TX-ZoSo]

Re: Optiquest Q7 Power Supply

Well, replaced all of the said caps minus the primary with Panasonic FC. I'm still getting the same orange light after a few seconds. Aside from the possibility that the primary failed, I'm stumped.

[mockingbird]

Re: Optiquest Q7 Power Supply

Let's have a look at the logic board.

[jetadm123]

Re: Optiquest Q7 Power Supply

Well, replaced all of the said caps minus the primary with Panasonic FC. I'm still getting the same orange light after a few seconds. Aside from the possibility that the primary failed, I'm stumped.

Can we get some pics of the entire power (top and bottom) and logic boards? No inline pics, use PlainBill's links in post #12.

Also, do you see any evidence that the backlights are attempting to start, like a brief flash?

[lcdman]

Re: Optiquest Q7 Power Supply

Hello,

Did you ever find the large cap. I have some if interested. I'll send ya some, do you use PayPal? If so send me a private message and we can discuss.

Also A New Member,
lcdman

[retiredcaps]

Re: Optiquest Q7 Power Supply

I'm still getting the same orange light after a few seconds..

Does the backlight flash on for 2 seconds like before?

[TX-ZoSo]

Re: Optiquest Q7 Power Supply

I'll get some pics up first thing tomorrow.

Yes, the backlight does come up for a second or two. Displays "RGB No Input Signal!".

[retiredcaps]

Re: Optiquest Q7 Power Supply

Yes, the backlight does come up for a second or two. Displays "RGB No Input Signal!".

Hookup a computer and verify you can see the image. If you can see the image, then you have what is called "2 seconds to black".

It is not uncommon for a LCD monitor to have more than one problem. Your first one was the bloated caps. The second one could be a bad inverter transformer or bad ccfl/wiring. See post #13 and #14 at

https://www.badcaps.net/forum/showthread.php?t=10419

on how to begin. I would focus on sections #4 and#5 to start.

[retiredcaps]

Re: Optiquest Q7 Power Supply

Well, replaced all of the said caps minus the primary with Panasonic FC.

Wait a minute! In post #1, you said the big cap read "well below 100uF, more like .1 nF".

Did you not order a replacement cap if the uF is reading well below spec? If you did order the big cap, why did you not replace it as well?

[TX-ZoSo]

Re: Optiquest Q7 Power Supply

I went on the assumption that it was unlikely bad. I remember testing it with a meter and getting a reading of 98uF once and every other time being in the nF range. I'll order a replacement.

[retiredcaps]

Re: Optiquest Q7 Power Supply

I'll order a replacement.

Before you order a replacement, with a computer hookedup do you see an image during "2 seconds to black"?