How hot is your 24" LED Cinema Display?

avalys

macrumors 6502
Original poster
Jun 4, 2004
299
23
My 24" LED ACD gets very hot. There is constantly a flow of warm air coming from the vents underneath, and the aluminum display casing is always very warm to the touch - not hot, but about as warm as my unibody 15" MBP gets when I am not running anything especially CPU-intensive. There is also often a barely-noticeable, but unmistakeable smell of "warm electronics".

Is this normal? I assume they put a fan in the thing for a reason, but it seems weird that an LCD would get this warm...
 

Sir Cecil

macrumors 6502a
Mar 31, 2008
793
0
Mine emits a light flow of warm air from the underside too. But the top of the unit feels surprisingly cool to me – the metal at the top of the iMac screen gets far, far hotter.
 

Tobler51

macrumors member
Sep 4, 2008
56
0
ye mine gets as hot as my mbp15"
apple cooling = fail!

and my display gets black sometimes for about 0.5sec :( help!!?
 

harry454

macrumors 6502
Sep 13, 2007
466
1
my friends get hot as well, but it should be normal since all those leds are producing the heat, and theres not much ventilation
 

alphaod

macrumors Core
Feb 9, 2008
22,173
1,216
NYC
apple cooling = fail!
I'd rather not have my monitor has a cooling system that's louder than my computer; also if it fails in the next 3 years, that's what AppleCare is for. Besides, by then it's time to upgrade :D
 

Croatian

macrumors 6502
Oct 14, 2006
260
0
Ontario, Canada
My runs normal, not HOT at all, i use it all the time and everything. I've just had it on for 4 hours i've i touched it all around the back and sides it is normal temperature
 

zync

macrumors 68000
Sep 8, 2003
1,801
23
Tampa, FL
my friends get hot as well, but it should be normal since all those leds are producing the heat, and theres not much ventilation
By the way, LEDs barely produce heat. If anything, it's whatever they are using to lower the voltage because LEDs barely use any power. However, if there are enough of them, they don't need as much resistance.

The point: it's not the LEDs themselves that cause the heat.
 

MVApple

macrumors 6502a
Jul 18, 2008
527
1
By the way, LEDs barely produce heat. If anything, it's whatever they are using to lower the voltage because LEDs barely use any power. However, if there are enough of them, they don't need as much resistance.

The point: it's not the LEDs themselves that cause the heat.
perhaps its a combination of the displays and the notebooks power supply being inside a small case.
 

MVApple

macrumors 6502a
Jul 18, 2008
527
1
That's definitely it. I forgot it had a power supply in it. I was wondering why it had a fan.
I heard IPS screens produce more heat than TN panels as well. That's just something I've heard though, not sure if its true.
 

dwsolberg

macrumors 6502a
Dec 17, 2003
725
493
My 24" LED Apple Display normally runs very cool if: A. the Macbook battery is already charged, B. The MacBook is running in lid-closed mode, and C. Brightness is at about 60-70% (this seems to be the least important of the three).

For some reason, having both displays on at the same time seems to generate a larger amount of heat that I would have thought. Also, if it's charging the MacBook, that makes some heat. Also, if you have usb-powered devices connected to the monitor, that creates heat. For example, if I use my portable usb drive with bus-supplied power, the monitor heats up a bit. The brightness makes some difference, but not that much.
 

Blue Fox

macrumors 6502a
Apr 13, 2009
506
43
They're designed to run slightly warm. Even the new LED Samsung televisions run just about as warm as their florescent-backlit counterparts. Mainly, it's the internal electrics that get warm, not nessesarily the LED's themselves.
 

zync

macrumors 68000
Sep 8, 2003
1,801
23
Tampa, FL
I heard IPS screens produce more heat than TN panels as well. That's just something I've heard though, not sure if its true.
Maybe because of transistor count. It makes sense. I wasn't aware that the new 24" display was an IPS display. I wonder if the 24" LCD in my iMac is.
 

blackhand1001

macrumors 68030
Jan 6, 2009
2,595
22
I heard IPS screens produce more heat than TN panels as well. That's just something I've heard though, not sure if its true.
You are correct. IPS panels themselves (not the back lights) are the most power hungry (almost twice as much as others) as they have require an additional transistor per pixel to keep their pixels in alignment. The backlights on IPS screens also must be brighter than VA and TN. TN use the least power followed by VA Screens although there are some 6 bit PVAs now (All S-PVA is still 8-Bit or more) that will hopefully make their way to the mobile market.
 

islandsound

macrumors newbie
Jan 22, 2010
1
0
Not sure if anyone has answered this but here it goes. Yes it does feel like there is a fan on the left underside of the monitor. I did the lick my hand and feel around test. Sounds like porn but It's not. Another thing is I also noticed my monitor was getting super hot. This was due to my taking out the power supply to my powered USB hub that was attached to the back of the monitor. When I did this the monitor was powering the hub and all the connected items causing the power output of the monitor to increase. I plugged the power back into the USB hub and the monitor cooled down. I suggest anyone that is using the power from the hub in the back to attach another powered hub to alleviate the pressure it puts on the monitor. Just my 2 cents.
 

bvrulez

macrumors newbie
Mar 3, 2015
4
0
Hi, I thread is probably dead, BUT I have two 24" displays here and they have different temperatures. I have them both on one Radeon R7. One is cold, one is hotter.
 

UniDoubleU

macrumors regular
Aug 14, 2014
160
1
Thailand
I can confirm that in my years with the ACD 24, they do run warm. It's still running fine though. At least they're not as hot as the older one! :mad:
 

bax2003

macrumors 6502a
Dec 25, 2011
903
139
Serbia
ye mine gets as hot as my mbp15"
apple cooling = fail!

and my display gets black sometimes for about 0.5sec :( help!!?
What is connected to ? Maybe it needs firmware update / cable is broken / did you try to connect it to different source ?
 
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