IPhone – Test iPhone 4s hardware without battery. Possible

batteryhardwareiphone

So, I have this iPhone 4s, which was broken. So i replaced the screen. While I was replacing it, I accidentally broke the black wire that connects the battery to the motherboard. So I dont know if it works, and I dont want to spend money on new battery if the screen doesn't work. I also want to test the motherboard, since I replaced the screen because the old one showed blue vertical lines. So I need to be sure both screen and motherboard is functioning. Can you test it somehow without battery?

Best Answer

Yes. Even with the battery disconnected you will be able to test the iPhone as long as it's plugged into the wall. I repair Apple products professionally and I am positive that it is possible, having tested an iPhone 4s this way just last week.

Using a mirror, that's about as good as I can get proving this with a photo.

Test the old screen like this

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Mac – Can’t run Apple Hardware Test as Mac crashes

The Apple hardware Test are very hardware specific.

To know yours you need to know the exact model for it.

Then you can look up and download in this database:

or from here:

https://github.com/upekkha/AppleHardwareTest

Yours is probably in this group

MacBook

MacBook2,1 Mac-F4208CA9
MacBook2,1 Mac-F4208CAA
MacBook3,1 Mac-F22788C8
MacBook4,1 Mac-F22788A9
MacBook5,1 Mac-F42D89A9
MacBook5,1 Mac-F42D89C8
MacBook5,2 Mac-F22788AA
MacBook6,1 Mac-F22C8AC8
MacBook7,1 Mac-F22C89C8

Here are some instructions how to and some more here.

IOS – iPad won’t turn on after a complete battery drain

Assuming it is now charged…

Hold Home & Power buttons for at least 45 seconds, see if it starts up normally.

If not…

Plug your iPad's USB cable into a computer with iTunes.
Hold down the Home button [keep holding] and connect to your iPad.
Keep holding the Home button until you see a screen telling you to connect to iTunes.
iTunes should show you a popup saying that there is an iPhone or iPad that is in Recovery Mode and needs to be restored before you can use it.
Click OK.
Click on Restore iPhone/iPad.

If the above doesn't work, you may need to get a fully operational iPad charger and plug it into the wall. The current and voltage needed to wake an iPad with a deeply discharged battery (or one that's malfunctioning due to age) is higher than a computer can provide over USB.

Plug into a known good iPad type adapter (higher current than iPhone charger)
Wait 15 minutes
Try powering on
Wait 10 minutes
Try a hard reset (hold home button and sleep wake button together for 15 seconds)
Wait 5 minutes
Try powering on

At that point, you can let it charge for another hour and try again or start with a different cable or a different charger. Eventually, you'll need to have the iPad serviced if it cannot wake from sleep due to a very low batter charge condition even when plugged into power.

Best Answer

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Mac – Can’t run Apple Hardware Test as Mac crashes

IOS – iPad won’t turn on after a complete battery drain

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