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Wokt
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EliteBook 8770W not booting, Caps Lock flashes erratically (12, 15, 16, 17 times etc)

HP Recommended
EliteBook 8770W
Microsoft Windows 10 (64-bit)
Who has detailed repair information?

 

I had to replace the motherboard after the old one failed to turn on completely.

 

I've learned that the separate laptop components are all required (modem, mezzanine boards for audio and USB, etc) for this laptop to do anything at all.

 

With everything connected (battery, HDD do not make a difference), this is what happens: the Caps Lock light blinks a few times, then flashes rapidly or turns off for a second, and the sequence repeats.

 

The number of blinks varies, but never matches any of the codes listed here:

https://support.hp.com/us-en/document/c01732674

 

The screen backlight never turns on, and there's never any VGA or DisplayPort output either.

2 REPLIES 2
David_J_W
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The Maintenance and Service Guide (click) is online. I don't know where to find any diagnostic information or blink codes - but perhaps someone else does.

Wokt
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Thank you, I'll see what I can find in there.

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