I have issues with My HP 650. Before now I have been having error of the cap lock blinking thrice when I tried turn my computer on. Then, I went online to search possible solutions amongst which was to check AC adapter, battery. But my AC adapter is good but the battery has not been good for long but run it from AC adapter plugged in. But, yesterday I changed the battery and it was working fine. Even runs on battery. I charged the battery full this morning then discounts the AC adapter to run the computer on battery. About, 7minutes of usage, my laptop shut down and when I tried turn it back on, the system displace cap lock blinking thrice while power bottom and WiFi lights are on.
I went back online and here, I got to know thrice blink of the cap lock is for memory(ram). Then, I shut down the system, removed, cleaned the ram and resits them. But still the blinking is not gone and the system never turns on.