Screen has just gone dead with only android symbol and no buttons work
Hi Alf. How's the phone going? If it still won't boot, try charging it first for at least 15 minutes then turn it on again. Wait for it 'til it boots. If after like 30 mins and still won't boot, I'm afraid factory resetting the phone is the only way.
To factory reset it, turn off the phone first. Then press and hold power button + volume up button or Home button + Volume Up + Power button or Volume Down + Power button or Volume Up + Volume Down + Power button.
When you successfully opened Android reboot menu, choose wipe data/factory reset (you should see on the screen how to choose options).