Blinking caps lock LED on HP envy 6t-1100
A coworker replaced the keyboard on an HP envy 6t-1100 laptop because some
keys on the keyboard were no longer working. When he powered on the laptop
after replacing the keyboard, the laptop would no longer boot. Instead of
booting, the CAPS LOCK LED would blink three times slowly followed by a pause
and then the sequence would repeat. The F5 key LED was also lit along with the
WiFi LED, which was red. I found some posters on HP's website associating that
behavior with issues with a memory module. E.g.,
Blinking caps lock 3 times, screen black, f12 wifi light on Hp Pavilion
dv7-6c64nr entertainment pc and
Caps Lock and Num Lock blinking 3 times / Memory module issue.
He was able to resolve that problem and get the latpop to boot again by
blowing out the sockets with compressed air and cleaning the contacts on the
memory modules with rubbing alcohol.