iPhone 3G S Touchscreen Goes Wonky When Charging

[Corgy]

x

 

[YsoSerious]

I am the techy in service of a Black 16GB iPhone 3GS. It is well behaved unless plugged into power. When plugged in, scrolling though menus such as contacts becomes jittery, and if I hold a letter down on the keyboard, random keys begin activating across the screen. This behaviour stops immediately after being unplugged.
We have tried hard and soft resets, wipe and restores to no avail.

Has anyone else experienced this? We are considering trading it in for a new one.

Take it to Apple Store and see what they make of it. That is weird, my first iPhone 3GS had an unresponsive screen, took it in and got it replaced.

 

[appledude222]

Restore your phone first then take it to the apple store and try to get it replaced.

 

[SingaporeStu]

It happened to me too, but I was using a 3rd party USB power socket (with original cable) at work.

I plugged it into my computer's USB port instead, and it works fine.

Haven't tried it with the original USB power socket. I'll try it when I get home and let you know.

You didn't mention if you were using an original USB power socket or a 3rd party one?

 

[Corgy]

x

 

[SingaporeStu]

Yeah, let me know how that works, will ya?

 

[Corgy]

x

 

[xkon]

Jesus thats what im doing as well - i had ordered a USB charger for the car but had it rigged up in the meantime. ONLY does it then... thanks!!!

 

[desmond1982]

Don't do anything stupid or buy new chargers. It's a limitation of the capacitative touchscreen. The screen recognizes electrical signals from your fingers but when charging, it wobbles when touched because it is confused with electrical fields of your fingers and the charger.

Solution? Easy.

When you want to use the iPhone when charged, unground it by touching the metal bezel with your other hand.