Laptop that won’t boot up

[JadenL]

One afternoon, I opened my HP x360 Convertible Model 14-cd1055cl laptop to clean the fan. I had successfully did so, but I had accidentally unclipped one of the ribbon cables that connected the usb port and the headphone jack to the motherboard. I only noticed it after I put the battery back in. I then went to take the motherboard out so I could connect the ribbon cable while the battery was still in. After connecting the cable and putting the screws in, a spark flew out of the computer. I thought nothing of it and finished putting back the bottom lid on. When I tried to boot up my pc, it wouldn’t boot up as it was supposed to do. The light next to the power button lit up for 5 seconds when I pressed it but then the light would disappear. I went back to check every cable in the laptop, but the pc would not boot up. The screen stayed black and the fan did not turn on. I believe that there is a problem in the motherboard due to the spark or a possible short circuit. My device is 6 years old currently and it’s warranty experiments years ago. What is wrong with my laptop, and how can make it work again?

[BeemerBiker]

There are not a whole lot of options.  I would examine the motherboard for any discoloration on the circuit board and compare to any of the disassembly videos  that are on YouTube or photos of similar motherboards on eBay.  Since the spark was caused by the battery possibly the circuits that handle charging were damaged.  Diode damaged is fairly easy to spot and somewhat easy to replace unlike tiny SMDs.  Here are some things to look for. If you see any obvious damage take the laptop to a shop along with photo of the damaged part so the tech person thinks you are knowledgeable and  gives an honest estimate.

The cheapest solution is to find a similar used model on eBay that has a broken screen and swap its motherboard for yours.  Ask the vendor to show it works by connecting an external monitor.

Go to the below site, enter your serial number and look up the motherboard part number.  i am guessing it is L36455-601

https://partsurfer.hp.com/partsurfer

A replacement motherboard might cost as much as just buying a used system