u600 touch key problem not flex but hardware ic

[ciavatta]

hi guys , have 3 u600 on lab. all with good display e good flex an touch .
Need to repair one with this problem : touch keys dont work numerical keyboard all ok , only function on up touchboard . If i press one touch the led answer to my pression but not function , i have try the E2P reset but not solve , i have change the U200 from another U600 an not solve , the flex and all upper hardware its ok 100% guarantee , need to solve on main board help me , whic chip control the touch?
Regard
Ciav

[umarabbasi]

hi guys , have 3 u600 on lab. all with good display e good flex an touch .
Need to repair one with this problem : touch keys dont work numerical keyboard all ok , only function on up touchboard . If i press one touch the led answer to my pression but not function , i have try the E2P reset but not solve , i have change the U200 from another U600 an not solve , the flex and all upper hardware its ok 100% guarantee , need to solve on main board help me , whic chip control the touch?
Regard
Ciav


change the front cover or there is one Ic with touch changed it its ok but its very sencitive .

[ciavatta]

soory i have 3 front , from 3 u600 with various problem , its rare 3 u600 with touch front damaged no?

[aleshek]

Hi ciavatta,

i have the same problem with U600 (blue) and U600G (gold version). Touch keys LED answer by touch but no function. The ribbon, mainboard and lcd are ok, did you solve your problem?

Thanky you