While charging I my Samsung J7 mobile via wall charger it's shows charging ICON Blink. If try to power on it will always show startup logo (model name) and again turn off display and it's restart always.
But when I pressed Home+Power+VolumeDown
It's shown boot window.But it's not blink or restart.That window work perfect and I try to install OS via Odin3 v3.09.But it's not resolve my issue because when device restart It can't update apps because withing 10-15 seconds device restart again.