Zenfone 5 t00j charging, but not recognized by computer

I have bought a second hand t00j however it seems that when i connect it to the computer via usb, it is not listed anywhere, but it is still charging. I tried different USB ports. I have tried with one windows and one linux computer. The phone is in MTP mode, I have the latest intel drivers. It is not showing up in the devices tab on windows. I tried enabling usb debugging. Nothing is listed when i run "adb devices". I opened the phone to make sure the connector ribbons between the usb board, the sim card and the mombo are connected properly. Please help.