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Line of business laptops originally sold by IBM and then purchased by Lenovo in 2005. Older models (Pre-XX50) have a WiFi whitelist, so wireless card replacement is not as easy as buying a bulk generic card online.

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Lenovo L480 not booting but power LED is on

  • screen is blank, caps lock LED doesn’t light up
  • power LED and the red LED outside are on
  • holding down power button doesn’t do anything however the red LED blinks off and on every 7 seconds
  • when plugged in white charging indicator lights up
  • holding down power button while plugged in, red LED flashes on 3 times every 5 seconds and then turns off
  • this model does not have a reset hole or removable battery

please advice

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Hi @g0f0ndwyxr ,

Try a full power refresh and check if this resolves the problem.

Here’s the procedure:

Disconnect the charger if connected and turn off the laptop.

Dis-assemble the laptop and disconnect the main battery from the motherboard. You only have to disconnect it, not remove it.

Disconnect the coin cell RTC battery from the motherboard.
Here’s the hardware maintenance manual for the laptop. Go to bottom of p.75 & then to p.77 to view the necessary pre-requisite steps and then the procedure for how to access and disconnect both of the batteries.

Press and hold the laptop’s Power button for a full 30 seconds to dissipate any residual charge from the motherboard. This will reset the BIOS which may have become corrupted preventing a normal start.

Reconnect the coin cell battery and the main battery.

Re-assemble the laptop and connect the charger.

Try to turn on the laptop and check what happens.

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I can't do that the laptop is company property. I knew working from home was a mistake.

完成的

@g0f0ndwyxr Well the laptop will break even in the office, do not blame WFH.

完成的

@thesimpleguy and I could have had a replacement in a day

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You may try turning on the PC using another outlet, changing the charger, doing a Hard reset and checking the RAM.

Otherwise check out more methods provided in the post below.

https://www.minitool.com/data-recovery/f...

If none of these worked, it's probably the motherboard.

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