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(Spark in lcd connector and lcd flex cable after crooked insertion)

https://www.reddit.com/r/pcmasterrace/co...

My previous post is here in reddit and pics of the lcd flex cable the connector in lcd and motherboard also I'm ordering a new flex lcd it cost me 7 dollars(378pesos)

So as I was about to on my laptop(acer aspire VX-15)(VX5-91G) It flickers and glitch out so as a quick fix I reinserted the flex cable display(the one in the screen display) but here's the catch before even successfully reinserting the flex connector it got awkwardly slide in and cause a small spark. After that my laptop seems to be not opening it still has the blue screen indicator meaning it's charging and the red back lit keyboard is not working anymore as it sync when I open my laptop is this a short circuit or what???

In the case of my battery it does work but only for 30 seconds when left uncharged. Anyway I used to not use the battery before. For I plug in play before and it just so happened to work after reinstalling and upgrading to windows 11 from windows 10 because of my previous corrupted OS.

If the mainboard and lcd is hypothetically fried is there nothing I can do??? Are there degree of damages that can be possibly fix and what fix is it anyway?

I've hooked up the laptop in our tv and it's still not working. The keyboard is not litting up nor the acer logo in the screen.(update)

laptop ](https://ibb.co/rmxYzzL)

[the tv blue signal](https://ibb.co/8stcc5G)

[the connection](https://ibb.co/B3CXxYh)

Also the charger doesn't get hot as usual so maybe problem with charger or what??(udpate)

Also sorry for my english for it is not my native tongue.

I need help so bad cause in our country being ripoff in tech fix repair shop is prominent and I don't wanna go there as much as possible.

Answer this question I have this problem too

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Hi @dzh77 ,

Presumably you had the battery and /or the charger connected when you reinserted the video cable, is this correct?

Golden rule with electronics - Always disconnect all the power from the circuit before removing/replacing any parts or components, cables etc. You can see what happens if you don’t.

For a start, you will need the schematics so that you know where to check that all the various voltage supply circuits on the motherboard are OK.

Here are some links to suppliers for a Compal LA-E361P C5PM2 Rev: 1.0 motherboard schematic. I couldn’t find any free ones online so you will have to buy them. I assume that this is the make and model number of your motherboard. The information should be printed on the motherboard itself so that you can verify that it is or not.

Supplier 1 Supplier 2

If you don’t know how to read schematic diagram and/or you don’t know how to safely test electronic circuits, contact a reputable, professional laptop repair service and ask for a quote.

Also FYI Win11.0 may not have worked that well in your laptop even though Microsoft now says that it will work with older computers. Initially it was for computers using Intel >8th Gen CPU (your model has a 7th Gen CPU) and the motherboard need to have to have TPM 2.0 (Trusted Platform Module) as well (I don’t know if yours has or not - if you can get the laptop working check in BIOS). Here’s a link that may help with this.

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I believe it was unplugged only the battery was intact. Also just a add up thing I noticed is that in the first 3 days when plug in it had a blue indicator. But just recently the indicator is red and now is still red but blinking.

And what will be the next move If ever "the various voltage supply circuits on the motherboard are OK"

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@dzh77

If you meant that the battery was still connected then there was still voltage on the motherboard. If there was no voltage then there wouldn't have been a spark

The power button is not a power isolating button. It merely signals to the motherboard what the user wants to do. Think of the laptop as being in an extremely low power state when it is off, rather than being disconnected from any power at all.

If all the voltage regulators are OK then you have to find out why it won't start when the power button is operated.

There is a power on sequence as far as the voltages are concerned. I think that usually there is a +3V supply on the board from the battery (or the charger if no battery) even if the laptop is off, but then the other supplies derived from the 19V (or is it 20V?) battery or charger e.g. 5V, 1.5V, 1.2V are turned on when the signal is received by the motherboard's IO chip (chip that handles all functions on the board it is not the CPU it is another one) from the power button to supply the other components which are not powered when the laptop is off.

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https://ibb.co/nsSvXF5

https://ibb.co/m5gXRST

https://ibb.co/p26Sq9w

https://ibb.co/mG1NrW7

https://ibb.co/jD83CLf

Here's a pic of spark IDK if the connector is not burned at all from what I remember it's just a white spark.

Also is the CMOS battery removable relevant at all? and is it even removable in this model. Because I feel like I'm about to destroy the cable If ever to pull it out

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@dzh77

The fault is not in the cable. It will be on the motherboard.

Sparks are caused by electricity jumping over an air gap to the other side because there is a circuit for it to flow.

If the cable was incorrectly inserted then because the video cable also carries the LCD panel's LED backlight voltage supply from the motherboard to the panel it most probably was the reason for the spark.

This no doubt would have damaged the backlight power supply circuit on the motherboard.

These voltages are supplied to more than just one particular section of the motherboard so no doubt this is why the laptop is not working.

Board level faults are not easy to find and fix unless it is obvious which component has been damaged.

At least you can get the schematic to help because they will speed things up, but you have to know how to read them.

As I said, not an easy or simple fix. If you find it you will say it was easy to replace the faulty component but in finding which one it is may be very hard.

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@jayeff http://arisux.com/upload/uploads/schemat...

Yowwww I just accidentally find the schematic diagram in pdf for free. When I was searching for "PU1301 Mosfet acer" because I was looking up this MOSFET thing about motherboard and apparently this guy control the electricity or some s8 and maybe also one of the problem.(click open it on new tab and it should download)

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