How hot is your 24" LED Cinema Display?

Discussion in 'Mac Accessories' started by avalys, Feb 22, 2009.

  1. avalys macrumors 6502

    Jun 4, 2004
    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...
  2. jimmypopjr macrumors regular

    Jan 7, 2009
    Mine runs warm as well, but the fans aren't always running. I hope this is normal.
  3. Sir Cecil macrumors 6502a

    Mar 31, 2008
    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.
  4. fiercetiger224 macrumors 6502a

    Jan 27, 2004
    Um. I think he's talking about the LED Apple Cinema Display guys, not an iMac 24-inch... :p
  5. Sir Cecil macrumors 6502a

    Mar 31, 2008
    I think we already understood that well enough.
  6. Tobler51 macrumors member

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

    and my display gets black sometimes for about 0.5sec :( help!!?
  7. harry454 macrumors 6502

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


    Feb 9, 2008
    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
  9. playalistic macrumors regular

    Sep 27, 2007
    Surrey, UK
    Mine's not warm at all. I usually run it at around 70 - 80% brightness. I'm sure that has some effect.
  10. nicolasmasset macrumors regular

    May 25, 2007
    My 23inch cinema runs hot as hell! It's like the heater's on in the room, seriously! I'll try lowering the brightness, hope that helps!
  11. Croatian macrumors 6502

    Oct 14, 2006
    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
  12. zync macrumors 68000


    Sep 8, 2003
    Tampa, FL
    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.
  13. MVApple macrumors 6502a

    Jul 18, 2008
    perhaps its a combination of the displays and the notebooks power supply being inside a small case.
  14. zync macrumors 68000


    Sep 8, 2003
    Tampa, FL
    That's definitely it. I forgot it had a power supply in it. I was wondering why it had a fan.
  15. MVApple macrumors 6502a

    Jul 18, 2008
    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.
  16. dwsolberg macrumors 6502a

    Dec 17, 2003
    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.
  17. Blue Fox macrumors 6502a

    Blue Fox

    Apr 13, 2009
    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.
  18. zync macrumors 68000


    Sep 8, 2003
    Tampa, FL
    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.
  19. Arthagnan macrumors regular

    Jan 13, 2009
    What! Does the all new 24" Apple-LCD have fans inside it?
  20. brentsg macrumors 68040

    Oct 15, 2008
    Yes but they are quiet. I wouldn't know if I couldn't feel the air when I held my hand up to the bottom.
  21. blackhand1001 macrumors 68030


    Jan 6, 2009
    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.
  22. islandsound macrumors newbie

    Jan 22, 2010
    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.
  23. bvrulez macrumors newbie

    Mar 3, 2015
    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.
  24. UniDoubleU macrumors regular


    Aug 14, 2014
    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:
  25. bax2003 macrumors 6502a


    Dec 25, 2011
    What is connected to ? Maybe it needs firmware update / cable is broken / did you try to connect it to different source ?

Share This Page