Flashing power lights green and amber will not power up

SOURCE: power failure with compaq amarda

DC Power Jack is most like defective. Typically bad/cold solder joint. Since this is a 3 state 2 prong jack, it would be best to locate and OEM Jack and replace- simply reflowing or resoldering does not always fix it. 3 State means the battery will charge with AC on and Laptop off the laptop will work with the AC on the laptop will work with the AC off and battery charged Worse case scenario an on board fuse blown (rare) Don't forget to rate me - Why? Because if I don't know if answering helps, I'll stop posting.

SOURCE: My Compac Armada M700 does not power up.

Had the same problem with My Compaq M700 No Boot Or Post. Battery Light Flashes 8 Times, Have to Wait 24 to 48 hrs sometimes longer to get Laptop to Start. Tryed the DC Converter Board Change No Difference same Problem. Noticed When Laptop Did Start Clock Time Was always a Little Off 2-4 Hours sometimes more. So Figure CMOS Problem With Time Issues. Read About Battery Memory Transitor Voltage spike Detection Issues Corrected With Newer Bios Flash at HP Supports. So I Flashed Bios With Latest 686h. During the First Boot After Reflash Battery LED Did flash No Start, After pushing the power button again it Started. And has Every since.So Far Laptop Now Boots Everytime and CMOS Checksum Seems To Keep Time Correct In Windows. The Bios Flash Corrects a Voltage Spike Detecting Transistor In The Charging Circuit. During First Start after flash Bios will run system test on the charging system and Correct CMOS. Worked for Me Hope this Helps a Few.

SOURCE: Flashing lightning bolt on Compaq C300

i think the battery is depleted so the power supply can no longer charge the battery