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How can I fix my laptop that turns on but shows nothing on the screen?

So I decided to update to my HP 8440p elitebook and thought I could do it just like any other software, I had no idea.

I downloaded the installation from the official website and opened it and hit next next install like an idiot. The laptop turned off, I turned it on but nothing shows up on the monitor, just a black screen.

I did notice that the caps lock turns off and on which doesn't happen normally.

I've tried to hook up the laptop to an external monitor but still nothing just a black screen.

I would appreciate some help, thanks!

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Hi,

Did you check for error LEDs as suggested or can you get into BIOS on startup?

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I don´t think that the install trying and the no video problem are related, it could be a causality, so, I´ve seen that error other times and could be something very easy, try powering off your laptop and taking out the RAM memories and cleaning the contacts of the memory with an eraser; then make sure that there is no rest of the eraser in your RAM memories and put them back and try powering the laptop on.

If the problem remains there are other things to do, but try the easy way first.

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thank you for the answer, I tried this but it still turns on with nothing sitting on the monitor

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try an external display, if the problem remains, you´ll need to disassembly entirely you laptop and try a full clean-up.

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Hi @godric29085

Please confirm the model number of your laptop.

Water in contact with electronics is never good. You need to open the laptop and check if any damage has occurred.

It may not be evident straightaway, but unless you've been extremely lucky problems will start to occur in the days and weeks later.

The impurities in the water causes corrosion and provides circuit paths for the electricity which were not in the laptop's operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away

Do not continue to charge or to turn on your laptop and remove the battery as soon as possible to minimize any further damage.

Then you need to dis-assemble the rest of the laptop and clean all the affected parts using Isopropyl Alcohol 99%+ (available at electronics parts stores) to remove all traces of corrosion. If possible do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain additives which may leave conductive residues and is not as effective. If you do have to use it check the label to verify the amount of IPA. The higher the percentage of IPA the better

Here is a link that describes the process. Electronics Water Damage

As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. Remove the shields that may be covering some components as the water may have got in under there. The ends of any flex cables and their connectors need to be cleaned as well

Hopefully after you have done all this it might possibly work correctly again. If not then the schematics and the service manual may be needed to try and fix any problems.

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Sir I have same problem but your way was doesn't work.

Please sir give me another solution.

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@Dharmveer Gurlya it seems like there are two separate conversations going on here. We will need to know a few things from you. What computer are you referring to (make and model)? What happened to it? Did you try to update something on your computer? We need MORE details so we can pull this together and help you out....

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What did you update? Windows 10, an application, . . .?

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@aactech mike, I am making an assumption here so correct me if I am wrong. Your questions are in reference to the question by "Dharmveer Gurlya" not the OP.

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Watch this video to find out how to read the blinking caps lock message, then if your battery is NOT removable watch this one to see how to reset it.  If your battery is removable try this, to reset it.  Shut down the laptop, unplug the AC adapter and remove the battery.  Press and hold the power button for about a minute.  Reinsert the battery, connect the AC adapter and see if the laptop boots.

Follow the advice on the specific error code at hp. See @jayeff "s comment for the link

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Sir i also try this method but not any positive result.

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This is not answer...

I'm currently experiencing the same issue with my hp 8440p laptop I've been using windows 10 for about 5 months+ so I don't think that's the issue.

Mine started when it got soaked with water very little though, it was on sleep mode when it happened, I had to restart it to make sure everything was ok, everything was.

But the next day I boot my laptop everything seems normal but the screen won't boot, it continued for 3-4 days the screen came back on after that day I shut it down next day it the screen won't boot again.

I decided to give it time to get it $@$* together so after a week (cos I'm a med student not always at a point for long and I need that laptop so badly) the screen came on, that was yesterday but the keyboard isn't working, I restarted it the keyboard won't work I asked AI it gave me the same instructions (remove battery, press and hold power button...) It's still not working.

As I'm typing this right now the laptop is on but the screen is not and the caps lock light is blinking and I don't know what else to do. My next move is to go see someone that'll repair it but I don't have that kind of money or time rn.

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HamidOutta さん、ありがとうございました!
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