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.
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.
Device
- Lenovo Yoga Slim 7 Pro
Issue
- Black screen, no display at all (internal or external)
- Laptop shows signs of power but won’t fully boot
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
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
Current behaviour
- Laptop powers on
- Keyboard light pulses (suggesting attempted boot)
- No display output at all
Suspected causes according to AI (based on troubleshooting)
- BIOS/firmware corruption
- RAM failure (possibly soldered)
- Motherboard fault
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