Laptop does not turn on after assembly?

In advance:

Picture attached

model: HP Pavilion 15-bbc03ng

The following problem:

I received my replacement keyboard or top case today, which I have now installed and tested earlier.

I plugged in the charging cable and the charging socket glowed orange, as always, but since not all the screws were inside, since I only wanted to temporarily test whether it worked, I then tightened all the screws again.

Unfortunately, I was able to find that since I have fastened the screws, the charging socket has not glowed orange, (indicative of charging) I unfortunately do not have a second replacement plug or a replacement charging socket for my laptop and am therefore thinking about ordering one online.

I'm unfortunately a bit skeptical right now because I no longer know what to do… All the boxes are properly plugged in, etc. The power supply should work, but unfortunately I don't have another laptop to test this.

The laptop can't be switched on either, which was still possible before the screws were tightened.

I'm grateful for any advice / help.

Kind regards

Would you like to mark the screws in question in the picture?

Unscrew and check… Somewhat pinched, bad plug contact…

What do you need a picture of the screws for?

I strongly believe that either the charging cable or the charging socket is defective.

I'm happy to show you the screws

Thank you for your answer!

Unfortunately, I have put everything in and out several times for 2 hours and checked it, but I simply can't find the fault and most likely assume a possible defect, which would also be strange, since it had worked before, where I only had a few screws inside would have.

It was about the positions of the screws in the PC. One of the most common mistakes is to swap them, choosing a screw that is too long for a hole and then causing the screw to short-circuit.

Oh, I did not know that.

But I actually only put in the screws that also fit in.

Are 3 types and not all 3 fit in the same hole.

I try to take everything apart again and then assemble it

Update: I removed everything, checked it carefully and plugged it in and it still doesn't work. Too bad. What should I do?

Did you have the battery inside or outside while tinkering? If you had it inside, you may have accidentally shot the board completely by a short circuit… One wrong short contact is enough… Take the battery out, the charger and wait… Then connect again. Overload protection may have prevented worse if there was a faulty contact and it only has to be de-energized for the electronics to reset… (it is worth it) … Otherwise all connections must be checked to see whether something has come loose. If all of this is not the case, the board is probably defective… The power supply can be measured (multimeter, if available) …

Well, if you (let's assume that that was the mistake) made a short screw, then you loved the power supply. Irreversible.

You can see if you can find a spot that could potentially cause a short circuit if the screw is too long.
In addition, such a multimeter should work wonders.
To do this, you have to be electronically savvy and have a rough idea of where and what voltage should / should arrive.

The battery was inside, oh dear, that would be really bad.

do not have a multimeter ready, but can buy one is not that expensive anyway and test afterwards, thanks!

But in the worst case, how expensive would a mainboard be?

I only got the top case today and it would be really stupid if it were broken now.

Oh dear. The multimeter must be there. Time to get one. I hope it is due to the small charging socket or a loose contact. Could you tell me where I should measure with the multimeter? Probably at the end of the charger from the charger, right?

Well usually you follow the current.
You have an input voltage from the power supply. That should be around 12-20V, depending on the laptop.
Then you have a power supply after the battery, which provides the undervoltage for your mainboard. You test that too. Typical voltages are 12V, 5V, 3.3V.

Then you look on the mainboard where they are everywhere and whether they also arrive there.
You will hardly get any further without a circuit diagram.

Mainboard between 200-400 euro depending on the model… Then you have to make sure that you get the right one. Depending on the model, there are different variants… Keep your fingers crossed that it is something else (inexpensive) … 😉

Oh god… Thanks the laptop itself had an NP of 700 euro euro

I'll make everything clear, thank you for your help!

Oh, remember…
Measuring tips are also conductive. This means that you can also build short circuits if you slip or set the wrong mode.

For safety's sake I keep my hands off it, I don't even know the mode of it.