Forumsee logo
Forumsee » Hardware » Laptops » Read message
RSS: Subscribe to RSS

Repaired laptop charger , is it safe to use ? - General query

Troubleshooting Laptops & Notebooks - Badcaps Forums - www.badcaps.net
Hello , couldn't find a main sticky topic to ask simple queries so creating a thread...

I had a standard 20v 2.25A lenovo laptop charger with square tip and Lenovo b40-70 laptop .. it wasn't charging the laptop , as soon as i plugged in, laptop charging led would glow for some milliseconds and then switch off .. so i took it to a local tv repairmen .and when checked with multi meter the needle was flickering , he checked it with a bulb and it was flickering ... he opened it up and there was electrolyte leakage .. so capacitor was blown up .. and told me capacitor needs to be replaced

The first time he changed the capacitor , it was able to charge the laptop only when not powered on .. as soon as i powered on the laptop the charging led would switch off automatically and it wasn't taking the charge , he checked it again with the bulb and the bulb didn't power on .. but once the charger was switched off/on again it would power on the bulb and start charging as long as i didn't turn the laptop on .. and the cycle continued

so he changed the capacitor again saying this time he used a higher capacity capacitor .. and this time the charger was able to charge laptop perfectly even when laptop is powered on ..

now the question i have is.. is it safe to use this charger to charge laptop or should i change it..i am sure he must have used a cheap capacitor , can it kill the laptop motherboard ? with a high ripple or something ? or does the laptop and charger have safety features builtin to not accept the charge when it is dangerous or something ? and can i use this charger without worrying ?

i tried posting pics , opened it up but it is jammed in metal plate and couldn't get a decent shot where capacitor values could be seen

Thanks for reading ..
Date: Jul 16, 2017   


Last videos:

Airbar - Adding Touch Screen to your Laptop
Airbar - Adding Touch Screen to your Laptop
LENOVO YOGA 720 15 inch 2017 - Reviews
LENOVO YOGA 720 15 inch 2017 - Reviews
LENOVO YOGA 720 15 inch 2017 - Reviews
LENOVO YOGA 720 15 inch 2017 - Reviews
LENOVO YOGA 720 15 inch 2017 - Reviews
LENOVO YOGA 720 15 inch 2017 - Reviews
HP 15-AY168SA, Core i7-7500U add an external GPU mod
HP 15-AY168SA, Core i7-7500U add an external GPU mod
iCraig CLP290 factory recovery key?
iCraig CLP290 factory recovery key?
ASUS ZenBook 3 Deluxe - Anyone buying?
ASUS ZenBook 3 Deluxe - Anyone buying?
Has anyone run an external desktop graphics card before?
Has anyone run an external desktop graphics card before?

Cars ·
Travel ·
Pets ·
production-frontend