S22 screen stopped working after a battery replacement.

[Oberthan]

I recently noticed a slight bulge on the back of my s22, and i decided to change the battery myself. It seemed succesful for an hour, after which the screen suddenly went black with green streaks apearing and flickering horizontally.

The battery change process

While attempting to change the battery  i started by only disconnecting the flex cables at the main board and bending them back slightly. That was unsuccesful, so i removed the loudspeaker and fully removed the cables. I scrubbed off the glue left by the battery, planted the new one and reassembled the phone. I used b-7000 glue to seal the phone and squezed it between two blocks of wood for 6 hours.
I started using it, and it worked as expected, but after 1+ hours of use the touchscreen began doing weird things. Five minutes later the screen went black with horizontal green flickering lines and no touch worked.

The rest of the phone still functions normally, since i can feel vibrations and hear sounds as i normally would.

I have tried to fix the screen (to no avail) by:

• Connecting the old battery to the phone.
• Reseating flex cables.

What could be wrong with my phone? Could the flex cable be damaged or do i need a new screen?

[johnz237]

Hi! Welcome to the samsung members community!

The only thing that could have caused this is damaged or improperly connected screen cables. It is not recommended to do this yourself, as you risk breaking the device.

To me, the flickering/glitches suggest the cables are either bent oddly or have come slightly loose. Since you said you've attempted to reseat them and still nothing, there is a good chance the cables themselves are damaged.

[Oberthan]

So i have to buy a new cable?

[johnz237]

Cable, maybe even the entire screen—that's if it's not something else causing these issues. A screen going wrong could also be a RAM issue. I can't personally recommend doing it yourself, as you've experienced—it might damage the device beyond repair. It's normally recommended to send it to an official Samsung repair center.

If you do want to do it yourself, be sure to buy reputable parts from known suppliers.

[keith30]

A dear job in the long run especially if you have fit a new screen as I don't think it's just a cable fault.

[BandOfBrothers]

Hello @Oberthan 

As part of the Samsung Community Forum Guidelines. 

https://eu.community.samsung.com/t5/news-rules-faqs/community-policy-on-dangerous-diy-unorthodox-rep... 

I hope you get this sorted. 

[Oberthan]

After lying on lying on my desk for a day things have gotten better.
Now, instead of black screen with flickering black lines and no touch control, the screen first got functional, just tinted green with a few flickering lines, and a few minutes later it went completely back to normal.

It keeps switching between these two states