24' Asus Monitor With Dead Pixels and Redlight?

newmann · Sep 16, 2026

24' Asus C624BQ Monitor With 1920x1200 Resolution

The first picture shows how my monitor looks when I lock it. What is that red light that is there? Is that a big thing? When I use it normally, it looks like the 2nd picture. There isn't any shadow spots on this monitor but notice those tiny black dots. Are these dead pixels? If not, what are they? I use this 2nd monitor for things like YouTube and those small black spots have never bothered me that much.

I spent probably like $290 USD for it a while back. How much is this monitor worth now in this condition? Is this still worth at least $50 USD?

Secret Squirrel · Sep 16, 2026

Very few people will want a faulty monitor like the one you're hoping to sell because the problems could get worse. Someone might want one for spare parts. However, the shipping costs will exceed the value so selling it locally for cash (pickup only) is the most practical option. You'll be lucky to get as much as $50.

PS: They don't look like dead pixels to me because they're too large. They're probably dried on food spots but it's difficult to tell without an extreme close-up of the problem areas.

A Guy · Sep 16, 2026

The red area looks like a bad TCON board (Timing Control), the black spots are not pixels, looks like dust or bugs (not software, real creepy crawlies). Generally the TCON isn't replaced in a Monitor like a TV, it's possible, but prohibitively expensive

A Guy

newmann · Sep 16, 2026

The red area looks like that only when I lock my laptop and the wallpaper shows up and that is what it shows. It doesn't show any red area when I'm using it normally.

I have tried using lens wipes on those black spots and cannot wipe it out.

Bugs that went inside the monitor you mean? Could it be water damage or something else?

HeavyHemi · Sep 16, 2026

newmann said:
24' Asus C624BQ Monitor With 1920x1200 Resolution

The first picture shows how my monitor looks when I lock it. What is that red light that is there? Is that a big thing? When I use it normally, it looks like the 2nd picture. There isn't any shadow spots on this monitor but notice those tiny black dots. Are these dead pixels? If not, what are they? I use this 2nd monitor for things like YouTube and those small black spots have never bothered me that much.

I spent probably like $290 USD for it a while back. How much is this monitor worth now in this condition? Is this still worth at least $50 USD?

View attachment 183095 View attachment 183096

Good condition would get you $50 on ebay. I am not sure why you're asking when you can look all this up yourself and you have the actual items to make a judgment on the condition.

Helmut · Sep 16, 2026

The second image has signs of Display panel aging, specifically the White Backlight LEDS. The colour temperature is higher on the right side of the panel. The LEDS have aged and changed their colour temperature.
The blackish marks are either dust/debris on the surface of the panel or within the LCD layers.
Whilst the surface can be cleaned carefully, between the LCD layers means re-assembly of the display panel/new one.

The first image shows the panel to be IPS. The Red blodge possibly damage to the top edge of the panel and lighting.

I have a 2013 Laptop that shows the same display panel characteristics, higher colour temperature on the right side, from new there was a < 1 pixel bit of dust under the Touch screen layer.

newmann said:
I spent probably like $290 USD for it a while back. How much is this monitor worth now in this condition? Is this still worth at least $50 USD?

Not worth anything, you may have problems just giving that away, re-cycling I would think.

A Guy · Sep 16, 2026

newmann said:
The red area looks like that only when I lock my laptop and the wallpaper shows up and that is what it shows. It doesn't show any red area when I'm using it normally.

I have tried using lens wipes on those black spots and cannot wipe it out.

Bugs that went inside the monitor you mean? Could it be water damage or something else?

If the red area isn't what the monitor displays on purpose/by design, then the no video is when the red displays. If you see it no other time, then it is not a concern unless it does begin showing up on other video. The spots I did mean bugs inside assuming the front of the panel is clean. It's just thinking what could be there. Dust is a real possibility, just uncommon. I was a TV tech for decades and have certainly seen both bugs and dust inside a LCD panel

A Guy

newmann · Sep 16, 2026

I have no issue using this monitor though as those spots isn't a big issue. But is this monitor worth $50 or not much at all? Thing is it has 1920x1200 resolution which is a big difference compared to 1080P.

When you lock the computer, the screen should be black. It isn't supposed to be red.

I would be selling it in person and not shipping it. I"m curious if it's worth $50 or not in this condition. I have no issue using this monitor at all since I mainly use it as a secondary monitor.

trevo · Sep 16, 2026

newmann said:
I"m curious if it's worth $50 or not in this condition.

Its worth is whatever someone is willing to pay for it

newmann · Sep 19, 2026

Is there a way to know what Cable came with this monitor? I do use it with a dvi to hdmi cable with my computer but I bought that separately. I know it did not come with it and came with something else.

Google suggests below. I'm confused so when it says VGA cable and displayport cable, what is on the other end of each? Do they mean VGA to VGA cable and displayport to displayport cable? I don't remember it coming with a displayport to displayport cable. That doesn't make sense because I don't think monitors back then would even give you a displayport to displayport cable? Or they mean dvi to displayport?

The ASUS C624BQ monitor typically comes with an AC power cord, a VGA cable, an audio cable (3.5mm), a DisplayPort cable, and a USB cable

bobkn · Sep 19, 2026

newmann said:
Is there a way to know what Cable came with this monitor? I do use it with a dvi to hdmi cable with my computer but I bought that separately. I know it did not come with it and came with something else.

Google suggests below. I'm confused so when it says VGA cable and displayport cable, what is on the other end of each? Do they mean VGA to VGA cable and displayport to displayport cable? I don't remember it coming with a displayport to displayport cable. That doesn't make sense because I don't think monitors back then would even give you a displayport to displayport cable? Or they mean dvi to displayport?

The ASUS C624BQ monitor typically comes with an AC power cord, a VGA cable, an audio cable (3.5mm), a DisplayPort cable, and a USB cable

You have some odd misconceptions.

I had a Samsung U28D590D monitor (2014). I used it with a DP cable, which was the only interface for it that supported 3840X2160 @ 60Hz. The cable was DP to DP. I doubt that it came with the monitor. Graphics cards had DP before 2010.

VGA is analog. DVI and DP are digital. Some DVI ports also include an analog signal, and can be used with a passive adapter to provide a VGA output.

Some digital interfaces can be adapted to other ones using a simple passive cable. Some require active adapters. (I don't recall which, off the top of my head. HDMI to DVI-D can be done passively.) There are even active digital to VGA converters.

Regarding your original post about the monitor, I don't understand what you mean by "locked". The screen normally goes black when the screen is turned off. ("Off" means that it isn't receiving a signal. Like when the monitor is on, but the PC is off.)

There are any number of online monitor uniformity tests. The monitor looks dirty, rather than having a lot of dead pixels.

I have no idea what such a monitor would be "worth", even in pristine condition. 1920X1200 monitors are rarer than 1920X1080. The latter can be had, new, for around $100,

newmann · Sep 19, 2026

Helmut said:
The second image has signs of Display panel aging, specifically the White Backlight LEDS. The colour temperature is higher on the right side of the panel. The LEDS have aged and changed their colour temperature.
The blackish marks are either dust/debris on the surface of the panel or within the LCD layers.
Whilst the surface can be cleaned carefully, between the LCD layers means re-assembly of the display panel/new one.

The first image shows the panel to be IPS. The Red blodge possibly damage to the top edge of the panel and lighting.

I have a 2013 Laptop that shows the same display panel characteristics, higher colour temperature on the right side, from new there was a < 1 pixel bit of dust under the Touch screen layer.

Not worth anything, you may have problems just giving that away, re-cycling I would think.

bobkn said:
You have some odd misconceptions.

I had a Samsung U28D590D monitor (2014). I used it with a DP cable, which was the only interface for it that supported 3840X2160 @ 60Hz. The cable was DP to DP. I doubt that it came with the monitor. Graphics cards had DP before 2010.

VGA is analog. DVI and DP are digital. Some DVI ports also include an analog signal, and can be used with a passive adapter to provide a VGA output.

Some digital interfaces can be adapted to other ones using a simple passive cable. Some require active adapters. (I don't recall which, off the top of my head. HDMI to DVI-D can be done passively.) There are even active digital to VGA converters.

Regarding your original post about the monitor, I don't understand what you mean by "locked". The screen normally goes black when the screen is turned off. ("Off" means that it isn't receiving a signal. Like when the monitor is on, but the PC is off.)

There are any number of online monitor uniformity tests. The monitor looks dirty, rather than having a lot of dead pixels.

I have no idea what such a monitor would be "worth", even in pristine condition. 1920X1200 monitors are rarer than 1920X1080. The latter can be had, new, for around $100,

When I mean locked, I mean if I press control alt delete to lock the computer, the monitor that has that red lighting that shows up. So unless you lock it... you do that when say you are away from your computer for a while, then it isn't going to have that red light thing. So this isn't that big of a deal.

I can't clean it though with lens wipes. I tried it. I don't think it's dead pixels but not sure what it is.

At the moment, I connect a dvi to HDMI cable with this monitor. Besides this, what are the other ways for this? It seems laptop HDMI to DVI is the most popular for this? Then it's displayport to displayport?

24' Asus Monitor With Dead Pixels and Redlight?

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