The laptop screen is not turning on.

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HP EliteBook 845 G8

Repair guides, disassembly, and troubleshooting information for the HP EliteBook 845 G8, an AMD business laptop released by HP in December of 2020. Identified by model number 1W3K7AV.

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Tyu Yu @tyuyu

Rep: 1

Posted: May 5, 2026

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The laptop screen is not turning on.

The Caps Lock light is blinking 7 times, and the adapter light stays on what's the problem in motherboard or bios. askIFixitQuestion | device="HP EliteBook 845 G8" | title="Caps Lock blinks 7 times, screen won't turn on, charging light is on" | text="My HP EliteBook 845 G8 is not turning on. The screen remains black, the charger light stays on, and the Caps Lock key blinks 7 times. I have already consulted a technician who has been trying to fix it all day without success. We have likely checked basic RAM issues and hard resets. Could this be a corrupted BIOS that needs external flashing, an EC (Embedded Controller) failure, or a more serious motherboard/CPU issue? Any specific guidance for this model would be greatly appreciated." }}

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jayeff @jayeff Rep: 551.4k 11 425 1.6k · Answer 1 · 2026-05-05T18:24:21-07:00

Hi @tyuyu

Not sure what troubleshooting has been done but try a full power refresh in case it is a corrupted BIOS and check if that resolves the problem.

Here’s the procedure:

a). Disconnect the charger from the laptop if connected.

b). Disconnect the main battery from the motherboard.

c). Remove the RTC battery from the motherboard.

Here’s the maintenance and service guide for the laptop. Go to p.42 and p.44 (52 & 54 of 111 pdf) to view the necessary pre-requisite steps and then the procedure to remove the main battery and the RTC battery, respectively.

When the RTC battery is removed measure its voltage. If it is <2.6V DC replace it. The part number is L13694-001. Search online using the part number only, to find suppliers of the part.

d). Press and hold the laptop's Power button operated for a full 30 seconds and then release it.

e.) Reconnect the RTC battery (or its replacement).

f). Reconnect the main battery, re-assemble the laptop.

f.) When the laptop is completely re-assembled, connect the charger and try to turn on the laptop.

If it starts OK there may be a message about the date and time being incorrect. This is normal as the BIOS has been completely reset back to its default settings. Once the date and time have been adjusted the message won’t appear the next time that the laptop is started.

If you had previously changed any user defined settings in BIOS to suit whatever specific hardware configuration that you had for the laptop, then these will have to be set again.

HP EliteBook 845 G8

The laptop screen is not turning on.

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