Try without a battery connected, only on wall power. If the CMOS battery is removable, remove it and all power, hold in power button for about 30 seconds. Plug in only wall power, see if that turns on. If not, it's most likely a dead motherboard.
Try without a battery connected, only on wall power. If the CMOS battery is removable, remove it and all power, hold in power button for about 30 seconds. Plug in only wall power, see if that turns on. If not, it's most likely a dead motherboard.