ipad air a1474 sleep lock button don't work,but turn on

hi dears

after change digitizer for ipad air 1rst model,all was fine when i test digitizer before installation.all work perfect.but after installation power button turn ipad on and off.but won’t sleep or wake ipadalso when ipad turn on its go to sleep directy after start.

i triedt lo lock ipad from home button accessibility,and its not work also from there.

hardware fix looking for if some expert here can help :)