Results 1 to 4 of 4

Thread: Mylar and CPU heat sink cooling mod. Reflect heat away from the touchscreen

  1. #1
    Regular DivXDemon's Avatar
    Join Date
    Aug 2011
    Thanked 25 Times in 21 Posts

    Mylar and CPU heat sink cooling mod. Reflect heat away from the touchscreen

    Hi all,

    I have recently been repairing iphones and while doing this I have notice something in their construction that I thought we should have. Both the iphone 3 and 4 have a mylar mirror coating on the rear of the LCD to reflect heat away from the lcd and touchscreen, and it really works well. If you have an Iphone check it out, even when the cpu is flying the back gets hot but the screen stays cool. This got me thinking about the vega and how hot it gets running roms like VegaICS and Vegacomb. This can make touchscreens wig out and is uncomfortable. The design is flawed. There is a Mylar sheet in the vega but its completly in the wrong place. It is in the right place to be an RF sheild (thats probably what its for) but for cooling its about as much use as a 3 bar fire. When I am using my vega (playing games) it gets so hot inside that I can feel the heat flowing out of the hole for the dock connector. If I lay back, with the bottom of the vega resting on my stomach and I have a tee shirt on it gets hot enough to become uncomfortable so I have to move it. The Mylar sheet stuck to the back of the vega is reflecting heat back at the motherboard LCD and touchscreen like a little oven. The only place for the heat to escape is through the LCD, touchscreen and the other small gaps and holes around the vega. The metal panel bettween the LCD and motherboard will slow down the heating of the touchscreen but not much and will probably just be trapping heat when it gets up to temperature.

    So to cool down the vega.

    This is really simple. I ordered a small sheet of dimple mylar off eBay (non-conductive and disapates heat better than normal mylar preventing heat spots. apparently. I have put it under the motherboard and on the back of the LCD. I also removed the mylar from the back of the rear panel. For good measure I cut a pieces of aluminum off a PC heat sink and fixed them to the Tegra chip and the ram chips (with alaska sheet type heat sink stuff, that's a technical term ). The heat sinks are probably overkill but it cant hurt and may meen overclocking will be cooler and therfore more stable.

    I tested it with and without the heat sinks and the overall temperature is significantly cooler on both. The screen now stays cool all the time, even when charging and using the cpu hard. The back still gets warm but no where near as hot as before. With the Addition of the heat sinks didn't noticably reduce the temperature but they will come into play when ICS gets overclocked.

    A nice side effect is the charger no longer causes the touchscreen to freak out (altough this could be eduardo's new driver). Fine accuracy is reduced while plugged in but the screen no longer double/phantom clicks and is usable for everything but drawing.

    Overall I am really happy with the mod. It's cheap and easy to do and cools the vega a lot. Next time I have the back off I may add another peice near the charge jack to try to completly remove the charge/accuracy problem. I have not noticed any problems with interferance caused by removing the mylar off the inside of the back panel although my neibours telly could be going haywire without me knowing (not my problem).

    Heres some pictures of what I did.

    The back of the LCD covered with mylar (hard to get a good picure because of the reflection.

    The metal panel back in with more mylar where the battery and motherboard are mounted, holes cut in mylar for the motherboard mounting screws.

    Everything back in except the battery.

    This show the original mylar sheet and where it was inside the back panel. Now removed and binned.

    The heat sinks

    Running as cool as a cucumber B)

    Just a quick update. 3 week on everything is working fine
    Last edited by DivXDemon; 04-30-2012 at 07:44 PM. Reason: update
    DivXDemon = Richard Lea
    Replacement Tablet Screens UK
    I offer a friendly, repair service for Tablet and Smart phone hardware problems. Just PM or email me your requirements.
    Spares, 3g/GPS upgrade kits, Replacement Touchscreens, LCD's and repair service for Advent Vega's and most Tablets.

  2. The Following 3 Users Say Thank You to DivXDemon For This Useful Post:

    indigolemon (05-17-2012), MichaelPerry (08-07-2012), Stephenc82 (04-10-2012)

  3. #2
    Resident papb0007's Avatar
    Join Date
    Apr 2011
    Thanked 32 Times in 30 Posts
    Very cool (pun unintended). Glad there are people who don't mind hacking hardware.

    Next up is portable water cooling, then phase change, and finally liquid helium. By the end you'll have a brick of ice that runs so fast it will only look like it's not moving when really it's looping in its own time field. :-)

    Sent from my Transformer TF101 using Tapatalk
    If you found my post helpful click the "Thanks" button.

    Konomi Kirby: (^'o'^) (^'o'^) (v'o'v) (v'o'v) <( 'o'<) (> 'o')> <( 'o'<) (> 'o')> B A Select Start

  4. #3
    Regular indigolemon's Avatar
    Join Date
    May 2012
    Dunfermline, Fife
    Thanked 21 Times in 21 Posts
    Did a variant of this last night. Top stuff, now need to work out what I'm going to do with the huge sheet of material I have left

  5. #4
    Join Date
    Jan 2012
    Thanked 0 Times in 0 Posts
    nice! I have no photos, but my solution is:

    put on the chip some thermal grease and on top 5 euro cent coin. Works also well

Remove Ads

Similar Threads

  1. Touchscreen Fix Issues
    By robbo247 in forum Vega General Discussion
    Replies: 1
    Last Post: 03-06-2012, 01:22 AM
  2. Replies: 0
    Last Post: 03-06-2012, 01:19 AM
  3. Possible Faulty Vega? (Heat impacts on touchscreen)
    By rockduderyan in forum Vega General Discussion
    Replies: 1
    Last Post: 11-27-2011, 05:07 AM
  4. Touchscreen non-interactive after OTA update
    By springwheat in forum Transformer General Discussion
    Replies: 2
    Last Post: 06-27-2011, 01:31 PM
  5. Can we check calibration of touchscreen?
    By Vector66 in forum Adam General Discussion
    Replies: 4
    Last Post: 05-26-2011, 02:07 PM

Search tags for this page

black mylar on back of iphone 4 motherboard


cpu heats-up easily mods hacks?


evening out a cpu heat sink


heatsink and cpu sheild modding


heatsink mylar


how to put a heatsink on a tablet processor


iphone 4 cooling mod


portable vega cpu


tablet cpu heat


vega mylar cooling mod

Click on a term to search for related topics.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts