My laptop keeps cycling like it can’t boot.

Question

I have a Latitude E6420 that I haven’t used in over a year. The last time I used it, everything was fine. Now, I’m not sure what it is doing. When I connect the power supply, the Power LED (back of display), the Power Button LED, and the Caps Lock LED all illuminate in white and the fan automatically starts spinning. I do not press the Power button, but that’s it, nothing else happens. The fan spins for 10-11 seconds, and then all 3 LEDs blink once, and the unit sits idle for ~7 seconds (the 3 LEDs remain on) before the cycle repeats. I left it connected for a couple hours, and there was never a change in behavior. I have read several posts on here that describe various LEDs blinking in patterns or other colors. I get none of that, and can not find any information on what could be causing this behavior. Has anyone encountered this particular behavior before? Could someone please provide insight as to a possible issue/solution?

ejn63 · Answer

Most likely the CMOS battery is dead and if the main battery was as well, start with a reset -- with the battery out and the system unplugged, hold the power button for 30 sec.  Remove and reinstall the memory module(s) and the hard drive or SSD. Reassemble and see if the system will then power up and boot.  If it won't, remove the hard drive or SSD and see if that allows the system to boot to a setup screen.

GeneralError · Answer

@ejn63​ I’ve ordered a replacement CMOS battery. Should I replace the battery prior to re-seating the memory modules and SSD, or does that matter?

GeneralError · Answer

@ejn63​ I replaced the CMOS battery, followed by your other suggestions. There was no change in behavior, at all. Is there anything else that I might try? The last time I used it, the laptop functioned fine. Even though it’s old, I hate to just trash it. Any additional troubleshooting steps/ideas would be greatly appreciated.

ejn63 · Answer

There really isn't much more to do.  It likely needs a system board -- bear in mind the value of the system (under $50) before proceeding with that option.

ZenitDrevo

Chi sono

Attività di ZenitDrevo

Statistiche impegno

Stati membri