Grilled power supply? Laptop Solved

Question

Hello,

Hello,

I recently made a serious mistake... when I arrived in class I saw that I had forgotten my laptop charger. I searched in my school’s facilities and found one that fit my laptop's connector, Great I thought! I plugged it in, nothing happened and when I unplugged it I heard a slight electrical noise (like a sound made by small sparks), AND then I looked (but too late) at the voltage of the charger, 40 V...(instead of 19V) and since then my laptop refuses to charge and since it has no battery left I don't know if I only toasted the power connector or if I fried something else (motherboard, CPU...etc) Can someone shed some light on this subject please?

If I have to replace a part of my laptop, like the power connector, I know how to do that no problem but what I would like to know is how to diagnose the issue with my laptop.

Thank you very much!
Have a good evening

EDIT: I own an ASUS K53SV

den3van · Accepted Answer

Testing your charger and motherboard with a multimeter

To test your charger (black wire on the neutral of the multimeter, probe placed on the external metal part of the power connector, and the red part on volts with the probe inside the power connector, MAKE SURE TO SET IT TO 20 volts)

To test your motherboard (disassemble your PC to access the internal connection that links the power supply to the motherboard, black wire on the neutral of the multimeter, probe placed on the black wire connected to the motherboard, and the red part on volts with the probe placed on the red wire connected to the motherboard, MAKE SURE TO SET IT TO 20 volts)

If the multimeter displays 0, 1 or 2, it means your power supply is dead

If the multimeter displays 0, 1 or 2, it means your motherboard is dead

den3van · Answer

I am a computer scientist and I am about 60% sure that it must be your motherboard, but let's pray it's not.

To find out if it’s your motherboard, you need to tell me if there is an LED that lights up when you plug in your charger without the battery.

MxM971 · Answer

Good evening, thank you for paying attention to my message,
nothing turns on, but I want to point out that a few days prior, while moving my plugged-in laptop without the battery (which I do quite often and with a lot of care), it started to have serious intermittent connections and the battery only charged when I fiddled with the power cable....
is there a way to physically check if the motherboard is burned out? or the power supply?

MxM971 · Answer

Alright, I'll take a look at that! Thank you.
Silly question, but I always post it because if it were the motherboard that was defective, I would be very annoyed to have spent €700 for a year of use. Normally, my computer is still under warranty; can I try to send it back? Do I have a chance of getting it repaired?

den3van · Answer

It's just a suggestion if it's under warranty. You tell them it stopped working overnight, and they will take care of it. However, you should back up your data because they might reinstall Windows and format the disk in the process.

MxM971 · Answer

for the data, it's not a problem. I will close this subject and thank you for enlightening me! Have a good evening!

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