Hey All,  The original thread had symptoms of No POST failure with no apparent flash code. It wouldn't be a true No Power scenario as we are receiving some signs of life with the keyboard coming on, even if brief. Please refer to the following troubleshooting if you are running into similar issues with a Dell system. Please be sure to view your system manual on our support site for guidance on accessing the internals of a system. Perform a hard reset: Disconnect any external devices including the AC adapter and disconnect the battery cable if able. Hold the power button down for 10 seconds (20 seconds for Alienware) Bypass any power strips, surge protectors or battery backups Verify the wall outlet is functional Reseat the battery cable if disconnected Plug only the AC adapter back into the laptop Attempt to power on the system If unresolved, please attempt a BIOS recovery: Verify that the laptop is powered OFF and disconnect the AC adapter. Press and hold the CTRL key + ESC key on the keyboard. Plug in the AC adapter to the laptop. Release the CTRL key + ESC key on the keyboard once you see the BIOS recovery screen. If the BIOS Recovery screen appears, select Reset NVRAM (if available) and press the Enter key. Select Disabled and press the Enter key to save the current BIOS settings. Select Recover BIOS and press the Enter key to start the recovery process The unit should then boot if successful If still unresolved, please attempt our Real Time Clock Reset: Turn the system off. Leave the power cable plugged into the system. Hold down the power button for 30 seconds. RTC reset occurs after you release the power button. Note: Holding the power button for longer than 40 seconds will abort the RTC reset. The unit should restart a few times and power on to a time of day not set page if resolved. Should there still be no change, then at this point you will want to remove the RAM, SSD, and WLAN card if accessible for your system.  Once these parts are removed, connect the AC adapter and attempt to power on the system Locate the power LED indicator on your system. The unit should get a 2 amber, 3 white flash code error for no memory at the power LED If the 2,3 code is present, reinstall the components one at a time to see if the particular part or slot is causing a short. If a part is identified to be an issue, then look into replacing it or testing with a known good one if available If the 2,3 code is not present, then you would need to start looking into a motherboard replacement.  Refer to the following links for additional guidance: Computer Won't POST No Post Troubleshooting If assistance is needed with these steps, then contact Dell GHN (Get Help Now) chat technical support Monday through Friday. Click the blue 'Get Help Now' on the right to start a private live chat session. Share the private Service Tag with them so that they can verify the ownership and warranty status. This will also generate a unique Technical Support case for your unique Service Tag. If already out of warranty, click here for the Dell out of warranty offerings.

Just fixed a 9305 with the same issue! Keyboard lights up (sometimes.. sometimes power wouldn’t do anything), single yellow flash before it all turned off again (power button didn’t seem to power it off either, just randomely went off) but nothing on display, no fans spinning etc. Remove battery. Remove cmos. Hold power for 30 secs. Install power plug (cmos and battery still removed). Power on - keyboard lights up and bottom led below track pad, automatically restarted once or twice then straight to bios! Exit bios, boots into windows fine. Power off, remove plug. Install cmos. Install battery. Turn on - back to bios. Exit bios. Everything works perfectly again. No idea what went wrong! Hope this helps others

Here are some steps you can try to make sure your laptop wakes up properly after Sleep mode: Update Drivers and BIOS: Outdated drivers or BIOS firmware can sometimes cause sleep mode issues. Ensure that you have the latest drivers and BIOS updates installed for your Dell laptops. You can usually find these updates on Dell's support website. Adjust Power Settings: Sometimes, power settings can cause problems with sleep mode. Try adjusting the power settings in the Control Panel to see if it makes a difference as per the video below: Disable Fast Startup: Fast Startup is a feature in Windows that can cause issues with sleep mode on some systems. Try disabling Fast Startup to see if it resolves the problem. You can do this by going to Control Panel > Power Options > Choose what the power buttons do, then uncheck the box next to 'Turn on fast startup (recommended)'. Check for Background Processes: Sometimes, background processes or applications can interfere with sleep mode. Make sure that no unnecessary programs are running in the background before putting the laptop to sleep. Reset Power Management Settings: You can try resetting the power management settings to their default values to see if that helps. You can do this by opening an elevated Command Prompt and running the following commands: powercfg -restoredefaultschemes Contact Dell Support: If you still need assistance, please contact support by clicking the ‘Get Help Now’ button located at the bottom right corner of the page. The button is marked with a help icon for easy recognition as per the picture below:

Disconnect the battery and the second cell. Wait 5 min, Reconnect the 2 cables and then plug in the ac adaptor. You should reach the boot menu to set your date as soon as it powers up.

Thank you for your quick response.

I actually got the logo to show up by pressing fn+f1+right key+power button (shift+power key didn't do the trick) for about 15 seconds to completely shut it off. Then I reset the clock on BIOS and after a couple of restarts it started working again.

Regarding drivers, is there a built in way to revert the updates made by Driver Booster? There are so many that I don't know which one is causing the issue. Updating each one by one manually sounds like a pain.