Question I have a Lenovo Yoga slim 7 which powers on, but the screen does not. I have tried lots of things, but no solution. Help would be amazing

[ThunderThistle]

Hello all,

Got this annoying black screen with the Yoga 7 slim, which is stopping me from using the laptop.

So basically, this laptop was working fine, then I think what went wrong was using the wrong charger (could be completely wrong). Anyhow, it now turns on, but the screen does not come on at all. See below everything I have tried- I used video guides, AI, all that, no luck. If this is going to be a big job that will cost more than the laptop itself (its not new). Please let me know. I haven't really got the funds to replace it, so I'm trying everything. Thanks to anyone who takes a look at this post, I appreciate it. Also to note, AI told me to do all this key inputs for BIOS boot attempts, I may not have done these properly (would have thought I did though) but you know, its possible. Thanks again.

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Device​

• Lenovo Yoga Slim 7 Pro

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Issue​

• Black screen, no display at all (internal or external)
• Laptop shows signs of power but won’t fully boot

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Symptoms observed​

• Initially:
  
  • Keyboard lights came on
  • No display
  • Power light flashing
• Later:
  • Fast blinking orange charging light (with non-original charger)
• After switching to correct charger:
  
  • Solid amber → then solid white charging light
• Current state:
  
  • Keyboard backlight pulses briefly
  • No screen at all (no backlight)
  • No Caps Lock response
  • No external display output

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Troubleshooting already attempted​

Power / reset​

• Hard reset (power button hold)
• 60-second and 90-second EC reset attempt.
• Tried powering on with and without charger

Charging​

• Initially used third-party USB-C charger
• Switched to correct charger (still third party but works with voltage etc.)
• Confirmed charging light now behaves normally (white)

Display​

• Tested external monitor (no signal)
• Tried display reset (Windows + Ctrl + Shift + B)
• Tried display switching (Windows + P)

BIOS / boot attempts​

• Tried accessing BIOS (Fn + F2 / F12)
• Tried BIOS recovery (Fn + R)
• No screen output at any point

Hardware reset​

• Opened laptop
• Disconnected internal battery
• Held power button (20+ seconds)
• Left unplugged for several minutes
• Reconnected and retried boot

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Current behaviour​

• Laptop powers on
• Keyboard light pulses (suggesting attempted boot)
• No display output at all

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Suspected causes according to AI (based on troubleshooting)​

• BIOS/firmware corruption
• RAM failure (possibly soldered)
• Motherboard fault

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[COLGeek]

Is the laptop still under warranty?

 

[ThunderThistle]

Hello,

No I can't imagine so. It's a second hand one given by family.