Skip to main content

16:9 LCD monitor with a 1600x900 resolution display.

4 个问题 查看全部

What would cause the power to the monitor to be unstable?

I got this HX2000 used a few years ago, so I do not know the history of the unit prior to me getting it. That being said it has been working very well so I do not think the monitor is in bad shape internally. However, I set it aside because 900p has largely fallen out of favor and can be difficult to live with. I have pulled it out of storage because I have plans to use it for a few projects I am working on. Anyway, this monitor has 2 different issues:

  • Image ghosting

Block Image

  • Inversion problems

Block Image

Block Image

For reference, this is how I tested the monitor. What is throwing me off is I don't see typical signs of failing capacitors. While the capacitors look okay visually, it isn't out of the question. It still has the original capacitors as well. From what I see, it looks like a panel or input board problem.

While I am willing to attempt a repair, my budget is limited because of some panel chipping that doesn't affect the monitor to the point of being unusable (with many being surface level) but one of them extends to the entire LCD itself (but is isolated). I'm flexible on this, but I'd really like to stay under what a typical used LCD monitor (in working condition) will probably cost locally (~$20-30, most likely). I'm going to say $10 is my hard limit. The local Radio Shack closed some time back, so I can't buy the capacitors for $1-2 each locally to recap both the power supply and input board anymore.

Update

Here is some photos of the capacitors on the video board and power supply, along with the panel damage

Block Image

Block Image

Block Image

Block Image

Block Image

Block Image

Block Image

Block Image

Update (9/21/19)

1 year update… Yeah, I didn’t get to this one for some time. Posting for closure.

I tested a small group of capacitors on the monitor (C819/823/820/837/840) and I cannot get a reading. As such, I think this one needs a full recap - if it’s worth trying. Since I sat on it so long (mainly because I paid $1 for it), it isn’t a display I desperately care about. I think I’ll run it until it dies and then move on unless I can think of a case a 1600x900 monitor is worth doing a full recap I don’t know if it’ll fix it or not.

It’s in need of 10 capacitors if I go for a full recap, so in a way it’s not one of those $5 experimental ones. I need to have some assurance. In lieu of a repair, I have provided a capacitor list based on what I found in mine to help others. I have another monitor that’s in perfect shape and have no trouble with getting good used ones (or finding ones with the right fault), so I didn’t really want to address this one. Not to mention getting it for $1 and probably 3-4 years is more then enough for me.

Answered! View the answer I have this problem too

Is this a good question?

Score 1
Add a comment

Android 维修工具包

一个新的屏幕或电池就在一个套件之内。

现在开始购物

Android 维修工具包

一个新的屏幕或电池就在一个套件之内。

现在开始购物

1 Answer

Chosen Solution

From your pictures I'm afraid I'm having difficulty seeing what the problem is.

You can't reliably assume an electrolytic capacitor is good if it shows no signs of swelling or leakage. It's worth getting a cheap component tester - you can get a bare-board on from the Far East for under £5. Only a couple of weeks ago I had to replace 3 electrolytics in a sound mixer which looked just fine, but one read half its rated capacitance with 11% loss and the other two were open circuit.

Was this answer helpful?

Score 2

评论:

I've never replaced the caps in this monitor. I t has very low hours (1,900 combined) but it was made in 2009 and uses the cheap caps I regularly see in consumer monitors. I got it when it was already 6 years old as well. Sadly I can't ignore it for the term of the project since the hum gives me a headache.

In the past I've had good luck with visual inspection over the years. I know it isn't perfect but bad caps usually look bad most of the time; that's why I use that method.

My camera makes it hard to see. I know :(. I tried but the camera doesn't show the problem.

It began making the transformer hum that goes hand in hand with bad capacitors in most situations, so some of them got to that point. I'm probably going to do a partial replacement, but replace the entire area that's bad. Yes, this happened when I visually inspected the caps. I know it's not ideal, but the (poor) shape of the panel makes it hard to justify a full recap.

by

Sorry I forgot to accept an answer on this :(. I got busy and forgot I asked this.

by

Add a comment

Add your answer

Nick will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 1

All Time: 171