when the adhesive strips are broken , you can try using fishing line to remove the adhesive from under the battery - https://www.youtube.com/watch?v=gkCyl7kR... also this method using steel wire seems even better - https://www.youtube.com/watch?v=W5GzU11q...

Here is a method a friend of mine developed - https://www.youtube.com/watch?v=gkCyl7kR... He uses fishing line to pull away at the glue. Also this method that uses a metal wire looks promising - https://www.youtube.com/watch?v=W5GzU11q...

I have replaced the faulty fan, and I removed them both for cleaning and both the GPU and CPU fas are exactly the same, just one is mounted face down , that why they look different in the guide, but they are 100% interchangeable and the same.

software and hardware as well. The iphone 5 and 5c have a really simple way of connecting to the home button, with two electrical; contacts. when you push the button it completes a circuit. I have "hit" the home button many times by bridging the gap between the contacts many times with a metal object in order to go home while testing a disassembled phone. And anyway the iphone 5s has a complex data cable for its home button.

hi, I have had the same problem in the iPhone 5s , when i replaced the screen, I didn't pass these two little parts shown here onto the new display assembly , and the proximity sensor didn't work afterward. One of these little plastic parts is the front camera lens, the other is a little bracket meant to hold the proximity sensor in place. You may need a heat gun to heat the glue to get these little parts of your old assembly. see this image: http://www.dhresource.com/albu_392699793...-1.0x0/holder-ring-lens-plastic-holder-for-iphone.jpg

para ver si es un problem de software - osea si el system operativo esta corrupto o si es un virus , lo que uno puede hacer es iniciar el sistema con un sistema diagnostico como hirens bootcd - http://www.hirensbootcd.org/download/ tienes que descargar el archivo ISO, quemar el ISO a un disco ocmpacto de por lo menos 700MB, y iniciar el sistema con este disco. si todavia aparece el problema con la pantalla al inciar con el hiren, proabalement es un problema de hardware, como el LCD o la connecion que va del LCD a la tarjeta madre..

if you can get your laptop to recognize the device, just restore it.. ... possibly it is in DFU mode, charge it up, then hold the home plus power buttons until it boots up... also try a different cable or computer...

according to crucial , you can upgrade it to 4GB on both aspire 4720 and 4920 , i think you want info for 4720, so here it is... ---------------- Memory Type: DDR2 PC2-6400, DDR2 PC2-5300, DDR2 (non-ECC) Maximum Memory: 4GB Slots: 2 How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. --------- http://edge.crucial.com/store/mpartspecs... crucial is great website to see if your RAM can be upgraded.... there memory is kind of expensive, so you can also get it from ebay

how much RAM does it have ? it could be a RAM memory or a hard disk issue... run a test on the RAM and hard disk drive

it could be a power supply issue , remove the power supply , and then test it and if it doesnt work, that is the problem... there are special power supply testers for this...