I have Lenovo legion 5 2020 model, i5 10300h, GTX 1650ti
The problem is it doesn't boot when connected to charger, when connected to charger and i press power button the power light on the key lights up but no display, no fan spinning.
Then if I remove the charger it boots on battery and works normal for 15 to 30 mins then it freezes no response I have to hard reset by holding the power button.
I went to repair shop and they told me they have to replace the motherboard and it may take a month or two to get replacement and also the price is high they said it may take minimum 30k, I don't want to spend that much so
is there any way to repair it or it is only worth for scrap or can I sell it as whole or as parts
I reinstalled windows, updated gpu and all drivers, reconnected battery, swapped ram tried running on one slot, borrowed friend's SSD and tried booting windows, all ended in vain.
Battery health is 60wh battery by design but currently holding 50wh as reported by hwinfo
This 2020 legion don't have option to disable dedicated graphics and use integrated graphics but can disable integrated and run only on dedicated using mux switch and i tried this too but it freezes,
I gave laptop to Lenovo service center in coimbatore they told to replace the motherboard so I gave to my frnd he took it to chennai Lenovo service center there they took a week and told the same,
I am 100km away from any city so can't able to find any good repair shop.
Guys don't bully me but I think taking help from chatgpt might do some good here so here's the result.
Thanks for laying out the issue clearly — that's helpful. Based on what you described with your Lenovo Legion 5 (2020) — specifically:
No boot when connected to the charger.
System boots only on battery, but freezes after 15–30 minutes.
Power light turns on, but no display or fan when plugged in.
Works briefly, then requires a hard reset.
These symptoms suggest a hardware-level power issue or something on the motherboard, power circuitry, or charging system. Let's break down the potential causes:
Likely Hardware Issues
1.
If your charger or charging port (DC jack) has a short or sends unstable current, it could prevent the laptop from powering on.
Try using a different compatible Lenovo charger (same voltage/wattage) to rule this out.
The charging IC (Integrated Circuit) on the motherboard could be damaged, failing to route power correctly when the adapter is connected.
2.
These are responsible for switching between battery and AC power. A damaged MOSFET could cause weird behavior when switching sources, especially during startup.
These often cause symptoms like no fan spin, no display, but lights come on — exactly what you're seeing.
3.
A shorted component (like a capacitor or IC) can prevent full power-on, but might still let enough power through for indicator lights.
When on battery, the system might partially function, but the short or instability eventually crashes the system.
4.
Could be overheating (fan not running?), thermal throttling, or power draw not being met by the battery alone due to worn battery cells or VRM instability.
Troubleshooting Steps You Can Try
Reset BIOS / CMOS:
Remove the battery (if accessible), unplug charger.
Hold the power button for 30 seconds.
Optional: Open the back and remove the CMOS battery for 5 minutes.
Test Without Battery (AC Only Boot):
Remove the battery.
Plug in charger only, and see if it powers on.
If it still doesn’t boot — more evidence of charging circuit or board-level issue.
Use an Alternate Charger (Same Wattage):
Rule out the possibility that your current charger is delivering faulty power.
Thermal Paste & Fan Check:
If you can open it up, check whether the fans spin freely and clean any dust.
Look at the heatsink contact — overheating can cause crashes.
Check Battery Health:
Use tools like Lenovo Vantage or HWMonitor (if it stays on long enough).
If the battery is swollen or degraded, it could also cause instability.
Most Likely Cause (Based on Your Symptoms)
Faulty power circuitry / charging IC or motherboard issue — especially since it doesn’t boot with the charger and freezes shortly on battery.
If you're not comfortable with board-level diagnostics:
Take it to a trusted laptop repair shop or Lenovo service center, and describe exactly what you told me.
Ask them to check the power circuitry and charging ICs, not just do a reinstall or battery swap.
I think there are multiple issues here in play, like short circuit, battery related issue and/or thermal throttling. If you are able to open the laptop and do a thermal paste change then do so. Your laptop might be overheating (apart from other issues). Try using power charger without battery installed (this is bypass power first being fed into the battery and if there is a short circuit there it will bypass that). Also try whatever else you can try. If nothing works then I'd say to keep trying different repair shops, maybe someone can actually fix it for cheaper. It's most probably fixable since laptop is at least able to run for 10-15 mins.
Guys don't bully me but I think taking help from chatgpt might do some good here so here's the result.
Thanks for laying out the issue clearly — that's helpful. Based on what you described with your Lenovo Legion 5 (2020) — specifically:
No boot when connected to the charger.
System boots only on battery, but freezes after 15–30 minutes.
Power light turns on, but no display or fan when plugged in.
Works briefly, then requires a hard reset.
These symptoms suggest a hardware-level power issue or something on the motherboard, power circuitry, or charging system. Let's break down the potential causes:
Likely Hardware Issues
1.
If your charger or charging port (DC jack) has a short or sends unstable current, it could prevent the laptop from powering on.
Try using a different compatible Lenovo charger (same voltage/wattage) to rule this out.
The charging IC (Integrated Circuit) on the motherboard could be damaged, failing to route power correctly when the adapter is connected.
2.
These are responsible for switching between battery and AC power. A damaged MOSFET could cause weird behavior when switching sources, especially during startup.
These often cause symptoms like no fan spin, no display, but lights come on — exactly what you're seeing.
3.
A shorted component (like a capacitor or IC) can prevent full power-on, but might still let enough power through for indicator lights.
When on battery, the system might partially function, but the short or instability eventually crashes the system.
4.
Could be overheating (fan not running?), thermal throttling, or power draw not being met by the battery alone due to worn battery cells or VRM instability.
Troubleshooting Steps You Can Try
Reset BIOS / CMOS:
Remove the battery (if accessible), unplug charger.
Hold the power button for 30 seconds.
Optional: Open the back and remove the CMOS battery for 5 minutes.
Test Without Battery (AC Only Boot):
Remove the battery.
Plug in charger only, and see if it powers on.
If it still doesn’t boot — more evidence of charging circuit or board-level issue.
Use an Alternate Charger (Same Wattage):
Rule out the possibility that your current charger is delivering faulty power.
Thermal Paste & Fan Check:
If you can open it up, check whether the fans spin freely and clean any dust.
Look at the heatsink contact — overheating can cause crashes.
Check Battery Health:
Use tools like Lenovo Vantage or HWMonitor (if it stays on long enough).
If the battery is swollen or degraded, it could also cause instability.
Most Likely Cause (Based on Your Symptoms)
This could require board-level repair, such as:
Replacing power MOSFETs
Reflow/reballing charging IC
Replacing the DC jack if shorted
Recommendation
If you're not comfortable with board-level diagnostics:
Take it to a trusted laptop repair shop or Lenovo service center, and describe exactly what you told me.
Ask them to check the power circuitry and charging ICs, not just do a reinstall or battery swap.
I think there are multiple issues here in play, like short circuit, battery related issue and/or thermal throttling. If you are able to open the laptop and do a thermal paste change then do so. Your laptop might be overheating (apart from other issues). Try using power charger without battery installed (this is bypass power first being fed into the battery and if there is a short circuit there it will bypass that). Also try whatever else you can try. If nothing works then I'd say to keep trying different repair shops, maybe someone can actually fix it for cheaper. It's most probably fixable since laptop is at least able to run for 10-15 mins.
I tried removing battery and running directly on battery still it didn't boot and I have already tried with another charger in Lenovo service center still it didn't boot and as of temps it is hovering 45 to 50 c so not thermal throttling
Why someone going to bully for using chatgpt I used it for troubleshooting windows many times
I tried removing battery and running directly on battery still it didn't boot and I have already tried with another charger in Lenovo service center still it didn't boot and as of temps it is hovering 45 to 50 c so not thermal throttling
Guys don't bully me but I think taking help from chatgpt might do some good here so here's the result.
Thanks for laying out the issue clearly — that's helpful. Based on what you described with your Lenovo Legion 5 (2020) — specifically:
No boot when connected to the charger.
System boots only on battery, but freezes after 15–30 minutes.
Power light turns on, but no display or fan when plugged in.
Works briefly, then requires a hard reset.
These symptoms suggest a hardware-level power issue or something on the motherboard, power circuitry, or charging system. Let's break down the potential causes:
Likely Hardware Issues
1.
If your charger or charging port (DC jack) has a short or sends unstable current, it could prevent the laptop from powering on.
Try using a different compatible Lenovo charger (same voltage/wattage) to rule this out.
The charging IC (Integrated Circuit) on the motherboard could be damaged, failing to route power correctly when the adapter is connected.
2.
These are responsible for switching between battery and AC power. A damaged MOSFET could cause weird behavior when switching sources, especially during startup.
These often cause symptoms like no fan spin, no display, but lights come on — exactly what you're seeing.
3.
A shorted component (like a capacitor or IC) can prevent full power-on, but might still let enough power through for indicator lights.
When on battery, the system might partially function, but the short or instability eventually crashes the system.
4.
Could be overheating (fan not running?), thermal throttling, or power draw not being met by the battery alone due to worn battery cells or VRM instability.
Troubleshooting Steps You Can Try
Reset BIOS / CMOS:
Remove the battery (if accessible), unplug charger.
Hold the power button for 30 seconds.
Optional: Open the back and remove the CMOS battery for 5 minutes.
Test Without Battery (AC Only Boot):
Remove the battery.
Plug in charger only, and see if it powers on.
If it still doesn’t boot — more evidence of charging circuit or board-level issue.
Use an Alternate Charger (Same Wattage):
Rule out the possibility that your current charger is delivering faulty power.
Thermal Paste & Fan Check:
If you can open it up, check whether the fans spin freely and clean any dust.
Look at the heatsink contact — overheating can cause crashes.
Check Battery Health:
Use tools like Lenovo Vantage or HWMonitor (if it stays on long enough).
If the battery is swollen or degraded, it could also cause instability.
Most Likely Cause (Based on Your Symptoms)
This could require board-level repair, such as:
Replacing power MOSFETs
Reflow/reballing charging IC
Replacing the DC jack if shorted
Recommendation
If you're not comfortable with board-level diagnostics:
Take it to a trusted laptop repair shop or Lenovo service center, and describe exactly what you told me.
Ask them to check the power circuitry and charging ICs, not just do a reinstall or battery swap.
I think there are multiple issues here in play, like short circuit, battery related issue and/or thermal throttling. If you are able to open the laptop and do a thermal paste change then do so. Your laptop might be overheating (apart from other issues). Try using power charger without battery installed (this is bypass power first being fed into the battery and if there is a short circuit there it will bypass that). Also try whatever else you can try. If nothing works then I'd say to keep trying different repair shops, maybe someone can actually fix it for cheaper. It's most probably fixable since laptop is at least able to run for 10-15 mins.
If you are from Mumbai - give them and check. PC Clinic Ghatkopar is the one I use. The owner is not here for 2 months, so dont expect high level fixes to go through.
They told it take approximately 30k to get motherboard replacement and takes 2 months to arrive motherboard after ordering from lenovo.
What problem do you have with laptop
