HP Pavilion Dv7 4180ea Black Screen

Hi,
I have a HP Pavilion Dv7 4180ea and my problem is that last night I put my computer on sleep and today, when I turned it on, there was nothing but a black screen, even if the computer was working fine in the background.
I connected it to my TV through a HDMI cable and the laptop is just fine, everything works perfectly when connected to the TV, but when not, the bloody screen won't turn on.
I searched what the problem would be, but I couldn't find anything relevant to my situation.
I tried a hard reset and then I took the whole laptop apart, cleaned it out, changed the thermal paste and everything, connected the display cable...and made sure it was properly plugged in and turned it back on, but no luck with the display, it is still black, even though the computer itself works.
Any help would be greatly appreciated.

Hello Flav,
I see that you're having issue with a blank display. I will try to help you with this.
As you've tested with another output source and it's working, this generally imply something wrong with the actual display.
Though you've taken it apart and put it back together may not have resolved, it it wasn't just a loose wire.
Anything software related, may not be viable to try, but you can still attempt a few things:
The remaining steps in here: Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
This may have additional steps -Resolving Problems with Notebook Displays
Also, make sure that the graphics driver is up to date. There were also recent Windows updates effecting computers in various ways included black screens. If this happened recently (after updates), try a System Restore
If none of the above works, I'd advise contacting phone support for repair/replacement options.
HP Technical Support, North America 1-800-474-6836. For all other regions click here.
Thank you for posting on the HP Forums
I worked on behalf of HP.

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Hello, @mtamcsin
Welcome to the HP Forums.
I see that the Windows login screen is skewed. I would like to help you on correcting this.
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Hi @Taqui3 ,
Thank you for visiting the HP Support Forums and Welcome. I have looked into your issue about your HP Pavilion dv7 Notebook and issues with the LCD screen not showing on the display after fan replacement. if you can see the image on a monitor it is not the graphics card and could be the LCD screen or the cable.
Have you connected the Notebook to a monitor? Here is a document on how to connect to a monitor if you need it.
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Here is a link to computer won't start for Windows 7.
You can do a system restore. System restore will help if something automatically updated and did not go well on the Notebook.
When performing a System restore please note remove any and all USB devices. Disconnect all non-essential devices as they can cause issues.
I hope something here helps you.
Thanks.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

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Hello narut,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your notebook is only displaying a black screen, and I would be happy to assist you in this matter!
Since you have already performed a hard reset and replaced the LCD, I recommend following this document on Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot. This should help your computer regain a successful display.
Please re-post with the results of your troubleshooting, and I look forward to your reply!
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MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

Pavilion Dv5-1009el - Black screen and blink caps lock and block scorr

Hi,
I just replaced the motherboard of my pavilion that reported an error as object. The purchased motherboard is new and hp original.
After having changed, I turn on the pc and work fine, i see the hp logo and enter to bios, after I turned off the pc without starting windows.
I inserted the battery and powered on the pc and returns to the old error, the LED of caps lock and block Lock blinks...
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Hi @shmurray,
Welcome to the HP Support Forums!
I understand you are getting a blink pattern on the Caps lock LED, when you turn on the notebook. I am happy to help you with this.
I am including the page on the error codes for your reference: Blank Screen LED Error Codes
From that document the pattern you are getting indicates a memory problem. You said that you have tested the memory. What exactly did you try?
The document suggests reseating the RAM or trying a new set of RAM and then restarting the notebook. If you are still getting a memory problem after trying both of those things, ie a 3 blink code again, then it would likely suggest that there is a problem with the motherboard itself, either with the memory slot or one of the controllers related to memory.
In that case I would suggest contacting the technical phone support number at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
If however reseating the memory or replacing it leads to a different error code or message please let me know, Although in that case the following may be helpful if you still have a blank screen.
Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
Here are some other sources I found that may be helpful to you.
Resolving Problems with Notebook Displays (Windows 7 and Windows 8)
I hope that this is helpful to you.
Regards,
Malygris1
I work on behalf of HP
Please click Accept as Solution if you feel my post solved your issue, it will help others find the solution.
Click Kudos Thumbs Up on the right to say “Thanks” for helping!

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Hello. I have a really bad problem, and is my laptop corrupted?! Today when I started it up I realized that my computer had something wrong with it. The screen was red instead of black. Even when it said *Starting Windows* it was regular, but the screen was red. When I checked the bios the color wasn't right. It's like everything black was replaced with red. The blue part of th bios was red! How can I fix this, and it's not
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Hello Flav,
I see that you're having issue with a blank display. I will try to help you with this.
As you've tested with another output source and it's working, this generally imply something wrong with the actual display.
Though you've taken it apart and put it back together may not have resolved, it it wasn't just a loose wire.
Anything software related, may not be viable to try, but you can still attempt a few things:
The remaining steps in here: Troubleshooting Black Screen Displays with No Error Messages During Startup or Boot
This may have additional steps -Resolving Problems with Notebook Displays
Also, make sure that the graphics driver is up to date. There were also recent Windows updates effecting computers in various ways included black screens. If this happened recently (after updates), try a System Restore
If none of the above works, I'd advise contacting phone support for repair/replacement options.
HP Technical Support, North America 1-800-474-6836. For all other regions click here.
Thank you for posting on the HP Forums
I worked on behalf of HP.

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Hi all please is any one help me I have my hp pavilion dv6 laptop.
The laptop is working,have the necessary sounds after i
turn it on,but the problem is that the screen stays always black
..I connect the laptop to external monitor and it shows that everything is working properly. But It not working on laptop screen what should I do heplllllll

Hi
I'll try helping you with this,
You'll have to give it for repair - display assembly replacement. The display panel might be at fault here as your system works good when connected to external monitor.
But before that,
Do a hard reset first --
Turn off the computer by pressing SHIFT KEY while you click SHUT DOWN.
Remove the computer from any port replicator or docking station.
Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
Unplug the AC adapter from the computer, shut down system.
Remove the battery from the battery compartment.
Press and hold down the Power button for about 15 seconds to drain any residual electrical charge from the capacitors that protect the memory.
Insert the battery and plug the AC adapter back into the notebook computer, but do not connect any of the peripheral devices.
Press the Power button to turn on the computer.
Next:
To confirm, connect it to other monitor & do a full extensive hard drive & memory test from BIOS, tap quickly F2 or F10 soon after powering on the system.
If all tests are passed, contact HP service center.
thanks,
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**I'm a Volunteer, I do not work for HP**

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my friend bought a dv7 pavillion notebook.
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Hello jschronce,
I see that you are having display issues with your HP computer. I have a couple of suggestions that may help with the issue. Here is a link with troubleshooting steps to correct common display issues. Follow the steps in the link and it may correct the issue.
The first step I would suggest is testing to see if the screen stays blank when inside the BIOS. This would let you know if it is a hardware or software problem.
Follow these steps to enter the BIOS of the computer.
Power the computer off
Power it on and immediately start tapping "F10"
This should open the BIOS utility on the computer
If you are unable to get this screen on the laptop display that means it is an issue with the screen itself. Since the computer is working on an external display the graphics card should be fine.
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The touch-sensitive controls right beneath the screen are all light up, but unresponsive. The battery light would stay on for 30 seconds, flash 6 times, stay on again, and the go dark; when I removed the battery, it naturally stopped. The fan continues to run but Num/Caps lock are both dark, no flashing.
Any ideas? I've tried hard resetting, turning it on and pushing f8/f2 numerous times, plugging in a new monitor, and reseating the RAM. Thanks for your time!

Hey @giollachriost ,
Welcome to the HP Forums!
I understand your screen is blank on your DV7 notebook.
If an external monitor presents the same issue you're probably dealing with a hardware issue. This is typically an issue with the motherboard or GPU.
Unfortunately there isn't anything I can suggest that you have not already tried (another display and reseating RAM). I would suggest contacting the HP Phone Support line to schedule service for the notebook.
Please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the following link to get the support number for your region: Phone Assist Worldwide.
Thanks!
Please click the "Kudos, Thumbs Up" at the bottom of this post if you want to say "Thanks" for helping!
Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

Pavilion dv6-3040sa, black screen, flashing caps lock

Hey all, In need of some help for a friend, her laptop has had this issue for a while now and only just come to me for help. Her HP Pavilion DV6-3040SA has an odd issue with it, if you power it up the display doesn't come on and the caps lock just flashes, it will continue to flash until the laptop is turned off. On the help section a flashing caps lock does not refer to any particular error. I've reseated RAM, tried hard resetting, reseated the CPU and it managed to power up, then after it was turned off, it wouldn't power up again and had the same issue, after playing with it some more it powered up and worked for 2 days, when it promptly stopped working again. Any reason for this issue?

Processor failures can be have inconsistently. I have seen processor failures start with 1-2 second hangs in the OS to working one day and not at all the next.
The blinking code you have desribed is a beep code of one. Review the following table found here.
Caps Lock/Num Lock
1
CPU
CPU not functional
Reseat replace CPU.
Service
Caps Lock/Num Lock
2
BIOS
BIOS corruption failure
Restore BIOS from onboard backup (jumpers)
Service
Caps Lock/Num Lock
3
Memory
Memory module error not functional
Reseat memory modules (see next section).
Test memory from UEFI or BIOS.
Replace bad memory modules.
Service
Caps Lock/Num Lock
4
Graphics
Graphics controller not functional
Service
Caps Lock/Num Lock
5
System board
General system board failure
Service
Caps Lock/Num Lock
6
BIOS
BIOS authentication failure
Restore BIOS from onboard backup (jumpers)
Service
The options for a blink code of 1 is to reseat the CPU as you have already done or to replace the processor. Since the issue returns after reseating the CPU, it looks like the CPU needs to be replaced. Sorry.

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