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.

 

[COLGeek]

From the sound of things, it would appear you have done all you can do. It sounds like the motherboard is at the root of the problem. Aside from replacing it (or the entire system), you can't do much else.

What specific model is your Lenovo?