HP ProBook 6540b won't boot and caps lock "blinking" continuously.

Hi,
I'm trying to help a friend with his laptop a Probook 6540b.
It won't boot and caps lock "blinking" continuously.
When I got it caps lock and num lock was "blinking" tre times... indicated memory problems, reseated the memory modules
and the the "tre time blinking" disappeared, but caps lock now blinking continuously and the only way to shot down the computer
is to disconnect the power.
Anyone with some ideas???
Janson

A neighbor had the same problem and asked for my assistance. I created a rescue disk using my HP desktop running Windows 7 64-bit. Even though her HP laptop was running Windows 7 32-bit, the disk allowed me to boot into windows on her computer. I then went to the HP web site and downloaded the latest BIOS and then flashed it to the BIOS chip following the instructions that came with the download. Everything is working fine now. Hope this helps.

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My laptop won't boot and caps lock blinking continuously (1blink in 4 sec.)

Sir,
Today morning I turned on laptop but laptop won't boot and wireless button glowing continuously and also caps lock blinking continuously as 1 blink per 4 sec.

do you mean 1 blink repeating and then a pause and 1 blink repeating again? The diagnostics show that as a CPU not functional issue.http://support.hp.com/us-en/product/HP-Pavilion-15-Notebook-PC-series/6529948/model/6622489/document/c01732674#AbT2 Try a hard reset.Follow the instructions at the following web page.http://support.hp.com/us-en/product/HP-Pavilion-15-n209tx-Notebook-PC-(ENERGY-STAR)/6529948/model/6622489/document/c01684768 If a hard reset does not help, then contact HP for warranty service. Is your notebook still in warranty?Check your warranty status Here.

Laptop Won't Boot. Caps Lock Button Light Blinking

I just bought a HP Pavilion DM4-2015dx laptop a few days ago. Turning it on this morning, it won't boot and the Caps Lock light is blinking. I have searched the HP site and Google for a solution to the problem and have found nothing to tell me what the blinking light means or why it won't boot up. Does anyone have an idea of what the blinking light on the Caps Button means?

My laptop HP pavilion Dv6 - 7132TX had a problem of blank screen and caps lock key blinking. I bought the laptop on 28th Apr 2012 and just before completing a year, I was facing a problem of computer inadvertently not booting. It used to show black screen with wifi LED red, power button LED glowing, and caps lock key LED blinking. http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&docname=c01443366 On going to the above link, I tried to notice the number of blinks of caps lock key LED.Found that the blink count was an endless loop of 2 LED blinks. On checking in the above link, found that 2 blinks meant the problem was BIOS corruption failure. LEDs blink 2 times BIOSBIOS corruption failure(as found in the table in the above link) So I went on and found another link to find the BIOS upgrade on the same page , where it read, Step 3: Find and download BIOS updates Then followed to the link: http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?swlinkmsg=100&cc=us&dlc=en&docname=c00042629&lc=en&product=4057208 to download the driver. Downloaded the BIOS latest driver and installed it. It gave the same problem while restarting the laptop which was required to complete the bios installation. Link for the BIOS installation: http://ftp.hp.com/pub/softpaq/sp54501-55000/sp54629.exe However after several force shutdowns and reboots (since in my laptop the blank screen during bootup was inadvertent and random..) the installation could proceed and complete. After that voila.. Problem gone Hopefully it stays that way. Now next task on my mind is to fix the sleeping problem of my PC and the noise problem of the speakers. 1.Laptop does not sleep and goes into freeze mode with LEDS glowing and screen black.2.While the laptop speakers are on, they constantly make some background noise as if the speakers have a loose connection. However I got a clue that the problem is not with the connections but with the frequencies mismatch. Inherent problem of laptop architecture I suppose. However still wish to hear sounds clearly on my laptop. Had a good experience with HP with my earlier laptop from HP. However now things are changing I guess. Feel good that I could at least troubleshoot and save money. [Even gas is Rs. 84 per litre.] and more importantly time since I was working when I saw this problem and did not want to keep laptop powered on All the time just to avoid restart .

Hp pavilion g4 1104dx display white screen and caps lock blink twice

Hi i recently used my hp laptop screen to test another laptop acer aspire 5517. After the test i reconnected back the cable only to power it on a white screen appeared with caps lock blink twice. I thought the problem might be screen shot so i decided to connect to external monitor but still no signal on external monitor even after pressing fn+f4. What might be the problem thanks.

Hi there , Thank you for visiting the HP Support Forums and Welcome! This is a great site to get answers and ask questions. I understand you are having an issue with your Notebook. You had stated that you receive a White Screen and the Caps Lock are blinking twice. Please be very careful when it comes to blink patterns as sometimes there can be a pause between the blinking. Before you start troubleshooting, please note remove any and all USB devices. Disconnect all non-essential devices, as these could cause some issues. Here is the first document I found called Performing a Hard Reset or Forced Reset. If that does not work, please follow Computer Does Not Start (Windows 8). The last document I have for you that may help is called Computer does not start and the LEDs blink or the computer beeps. Please follow these provided troubleshooting steps, re-post and let me know how everything went. Thank you! Have a great day!

Caps lock and Scroll lock blink continuously without stopping

HP Pavilion Dv5 1004nr entertainment notebook. Caps lock & scroll lock blink continuously. Power light is on. Power light does not flash. Fan and drive start upon powering up. Held down 4 arrow keys during power up, but does not solve problem. Removed all external devices and removed battery. Same problem. Please help.

Urgh, appears to be bad RAM... Running memtest and switching sticks in and out only shows errors with one particular RAM stick installed. I'll leave this stick out and try installing Arch again once the current memtest pass is finished.
I'd have expected better from Patriot!
Last edited by fukawi2 (2009-10-20 04:50:34)

Powerbook won't boot. Caps Lock Light and NumLock Light on. No other sounds

I'm posting a problem I'm having with my powerbook in the hope someone can give me advice as to what the problem could be. Or how i can fix it.
I have a PB G4 12" (1.33) running OS 10.4.11. All of sudden one day the laptop would not boot. I have tried the PMU reset, taking out the memory, plugging in an external firewire drive, etc but nothing works.
The laptop just won't boot, but I know power is being transmitted as the CapsLock light works, as does the NumLock (which is oddly activated by pressing F5).
Any suggestions/ideas on what the issue can be? Is it a dead mainboard/logic board? Or DCtoDC board?
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I found many others with the same issues.
Maybe we can read through their stories and find a solution???
http://www.pinoymac.org/forum/showthread.php?t=18510
http://forums.macosxhints.com/showthread.php?t=65275
http://www.maclife.com/forums/topic/74915
http://forums.macrumors.com/showthread.php?t=64020
http://forums.macrumors.com/showthread.php?t=110684
http://www.applefritter.com/node/18912
http://www.macintouch.com/readerreports/powerbookg4/topic2813.html#d06nov2006
http://discussions.apple.com/thread.jspa?messageID=7589764
http://discussions.apple.com/thread.jspa?threadID=733150&tstart=626
http://macosx.com/tech-support/mac/powerbook-g4-boot-problem/334350.html
http://lists.debian.org/debian-powerpc/2002/01/msg00288.html
http://www.pinoymac.org/forum/showthread.php?t=15844

Laptop won't boot up caps lock/number lock blink continuously

When I push the power button computer comes on . I can hear the disk drive and fan turning but then they stop then the caps lovk and number lock start blinking screen is blavk.
I have taken the battery out disconnected power supply held power button 15 seconds plugged power supply back in pressed power button same thing happens.

Hi,
Please try the following instructions:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443366&cc=us&dlc=en&lc=en&jumpid=reg_R1002_US...
Good luck.
BH
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Black screan and caps lock blinking repeatly after 5 seconds

My hp 250 have 1 year old. I was playing a game and my laptop shutdown, when I switch it on capslock blinks repeatly after 5 second and it makes black screan PLEASE HELP ME!!!!!!

Your PC is not able to perform POST: Power On Self Test can you tell me how many times does the Caps LOck LED Blink.Its a sequence. LEDs blink 1 time
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Memory
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Envy Dv6-7210us Windows 8 caps lock blinking continuously

Hi,
I noticed that there was a password set on my BIOS and I read in the forums that I could reset that by taking out the CMOS battery. Well I did such and while I was doing that I decided to clean my keyboard and fan unit, so I undid the screws for the keyboard and took the keyboard off. Now, after putting everything back together, my laptop will not turn on to the BIOS and thr caps lock light is flashing continuously and thr wi-fi amber light is on. I know the continuously single flash usually means there is a problem with the CPU, but I am wondering how this could have happened. I have done everything from the forums such as reseating the memory modules, trying to restore the BIOS, letting it sit overnight while running, power resetting, and taking out the CMOS battery again. Is there any other steps that I could be missing?

Hi,
This is the Maintenance and Service Guide for your Notebook: http://h10032.www1.hp.com/ctg/Manual/c03591281.pdf
Can you please go through the replacement procedures of the components that you already replaced and confirm whether you had done everything accordingly? We will have to make sure that we are not missing on anything that is not letting the Notebook boot properly now. Please take utmost attention when you check the procedure for the procesor. If we miss on a small thing, it could be a problem.
Please support me by clicking on the Kudos star if you like my post and “Accept as Solution” if my advice answered or helped your situation. These are the best ways in which you can thank me.
I am an HP Employee.

Repairing laptops that won't boot and show the blinking caps

Here's a little tutorial for all of you who have this annoying issue. It mostly applies to the 1 blink code (other codes have much simpler and straightforward solutions).
Ok, so the code says that it's caused because of a not functional CPU. That is most likely not the case. Most people who had the 1 blink code actually had a problem with the integrated video graphics card or northbridge of their laptops, not the CPU (in fact, CPU failures are quite uncommon). The problem is that these chips overheat quite often, they don't have good cooling and dissipation systems (most of the time, it is shared with the CPU which is absolutely insane), and the solder connections are of very bad quality. So with overheating, solder points start fracturing or cracking and they stop making contact, which causes all these issues, including the infamous RRoD and YLoD issues in the Xbox and Playstation consoles with their soldered video chips.
So there are two main ways of dealing with this:
1 - Reflow
This is a short-term but easy solution that simply consists of reheating the damaged component to the point of getting rid of said fractures. It has a high success rate, as many people will tell you. It worked for me always, but again, after some time the issue may come back. Still, this is a very simple solution that doesn't require too much skill or equipment and is satisfying enough for most users. This is what I'm going to show how to do in this tutorial.
2 - Reball
Reflowing doesn't always work, and when it does, it doesn't last long. Instead, reballing is a permanent solution which consists of removing the chip in its entirety and replacing all the solder contacts. Reballing requires specific equipment (a reball station), reballing stencils and leaded solder balls. It is a long procedure, which requires some skill and it only should be performed by experienced people. When a reflow won't work, you are better off sending your laptop to a reballing technician, or buying a new one (which would be a waste, in my opinion).
Ok, so how can we do a reflow? There are many ways to do this:
1) Reheating your laptop: This is a simple as it sounds. Some people call it the "blanket" method, because you can just simply turn on your laptop, wrap it with a blanket or sweater and let it run until it shuts down because of overheating. I absolutely don't recommend doing this, as there are probably many working components (particularly the hard drive holding your data) that won't benefit from the overheating. I recommend disassembling the laptop and taking out all the good parts, like the hard drive, RAM sticks and any extra PCI-e cards installed. After that you can just simply unplug the cooling fan connector from the board then turn the laptop on. This will cause it to overheat faster, so you won't have to waste hours waiting for it to get hot (using the blanket method, it can take a lot of time). Most laptops will shutdown themselves after reaching a certain threshold temperature, if yours doesn't, well, just keep an eye on it so you can turn it off before it catches fire. After it turns off, let it rest and cool for at least an hour, then connect the cooling fan again, turn the laptop on and see if it boots. If it doesn't, well, you can keep trying this until it does (not recommended after 3 tries or so), or try the next methods.
2) The oven method: This a bit tricky, but it may be more successful in some cases. First, strip down your computer until you get to the bare board holding the video chip. Remove the CPU, heatsink & fan, RAM, BIOS battery, wires, speakers, stickers, plastic sticky guards, foam spacers, absolutely everything that can be removed from the motherboard. Then preheat your household oven to approximately 200°C or 385°F. If your oven does not have a digital temperature display, perhaps use an internal oven thermometer to make sure the oven is in the right temperature range. Roll up some kitchen foil into balls, between half an inch and an inch wide, and place them on a baking tray. Place your motherboard, with CPU socket and GPU facing upwards, on top of the foil balls. It is a good idea to wrap additional foil around the more sensitive parts of the motherboard, like areas where there are capacitors and the CPU socket.
Try to wrap the rest of the motherboard in foil to protect it, leaving just the GPU exposed on both the top and bottom of the motherboard. Then place the baking tray with the laptop motherboard on it into the preheated oven.
Make sure your kitchen is well ventilated at this stage, turn on the extractor fan to full power and/or open an outside door and windows. This will help to take away any fumes. Ideally, you should leave the kitchen while any fumes are still present. A couple of times during the procedure, have a quick look through the oven door (without opening it) making sure there are no smoke or flames visible. This is unlikely to occur, but can happen if stickers were left on the motherboard. After 8 minutes, turn the oven off and open the oven door. Do not remove the motherboard from the oven at this stage, it could be very hot and it is a better idea to allow it to cool down gradually. Take care not to inhale any fumes that might be present. After 20 minutes to half an hour, remove the cool motherboard from the oven and begin rebuilding your laptop. If all has gone well, it will boot up and the problem will be fixed. If the problem remains, you could try the procedure again, leaving it in the oven for a couple of minutes longer.
After performing a reflow in an oven, I recommend cleaning the oven thoroughly, then turn it on and allow any fumes that may have built up to be completely removed. This is especially important before cooking food in the oven again.
3) The heat gun method: Probably the best way to do a reflow, it is less destructive than the previous method (as you can focus on a single place, rather than overheating the entire board), but it may be worse than the first. The first step is to test out how well your heat gun will melt the solder. Place a chunk of solder on a coin, hold the heat gun one inch above it and record how long it takes the solder to flow. Once you have the timing right, mask off the motherboard (already removed from the case) so that just the chip in question is accessible. Reflow with the same spacing and timing as you did during the coin test.
Did it work?
If your laptop works now, then you can do a couple of extra things to avoid this problem in the future:
Avoid overheating by underclocking the CPU: You can run your laptop's CPU at a lower clock speed (it will run slower, BUT not as much as you think. Undercloking by a 50% doesn't mean your laptop will perform 50% slower). It not only protects your laptop from damaging over time, it has the added benefits of making it run *much* cooler and quieter and also having longer battery life, which is awesome as well. To do this, simply (in Windows 7 and up) click the battery icon in your notification area, select More power options, then change the selected plan (like Balanced) settings (click on Change plan settings), select Change advanced power settings, scroll down and, under Processor power management, Maximum processor state, type on both 'On Battery' and 'Plugged in' a value less than 50%. Change Minimum processor state to 1% and then System cooling policy to Active.
Avoid playing heavy games and running intensive applications: Such programs very often cause the underpowered integrated graphics card and CPU to overheat, which causes all these issues. Use a desktop machine with dedicated graphics for such programs if you want your laptop to last.
Again, always take out the hard drive before any of these procedures if you don't wanna lose any data, and if you can, any other components that can get damaged in the way. Note that a reflow, particularly the oven or heat gun methods are usually last-ditch resorts because they can permanently damage your computer, in particular if performed incorrectly. DO IT AT YOUR OWN RISK. I can't be held responsible for any accidents or unwanted results that may occur after following this tutorial. If you have doubts, then you're generally better off sending your laptop to professional technicians than trying to repair these kind of issues by yourself. Unless a repair costs more than replacing your laptop, that is.
And before starting any of these procedures, try to research your issue on the Internet as much as you can. Search for your particular model, search in this exact same forum and any other as you'll be able to read about people experiencing this problem. You can search reflow on your favorite search engine and you'll find detailed tutorials and many videos which will show the procedure and help you do a better repair. Once you're very comfortable and knowledgeable with the subject, you can go ahead with the repair.

This is actually good stuff and well written but I hesitate to advise people to use either the "oven trick" or really even the heat gun method as both are notriously short-lived even if they appear effective. Your far better bet is to send the board in to one of the vendors on the internet who are set up to do a proper reball. Even those fixes are good for maybe 12-18 mos. But again, you get a high grade for spelling it out.

Hp Probook 4510s caps lock blinking no screen display

I rebooted my laptop and all the lights come on but network light ends to turn orange and caps lock blinking.

Well, my RAM will arrive tomorrow, we'll see if it works or not. Surprisingly, the laptop charges like it should, everything is fine except the 3 blinks.
I hope the new RAM will solve the problem.

Blank Screen; Caps lock Blink Twice Every 2/3 Seconds with orange wireless button.

Hi,
I am using my HP Pavilion DV6 7023tx laptop. It is 1 year 3 months older(warrenty expired). It was working fine but one evening i found it start with black screen and caps lock blink twich every 2/3 seconds and after some times it's getting hot.
I have tried to solve the issue accoroding to the following link
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c01732674
It looks like BIOS corruption failure. but it will not automatically recovering that mentioned in post.
So what should i do now?
Could you guys tell me what should i do?
Thanks in advance.
Product Information:
===============
HP Pavilion DV6 7023tx
Serial No : 2CE22927FG
Product ID: B3J66PA
This question was solved.
View Solution.

Hello SuperMario1,
Thanks for your response.
The last thing i did, remove CMOS battery and after a few minutes i plugged it.
Then connect AC power adapter and press power button.
Laptop starts but gives a error message
"The CMOS checksum is invalid, The BIOS will be reset to the default configuration and will be rebooted."
Finally laptop start normally. It works fine ...
But same problem when i restart
"blank screen caps lock blink 2 times every 3/4 sec"
So finally
1. remove CMOS battery and after a few minutes i plugged it again
2. connect AC power adapter and press power button
3. laptops starts normally (with a error msg same as previous)
4. Upgrade bios to F.29(previously i had F.24)
5. Everythings works fine (restart/shutdown have no effect)
Nirupam Chandra Modak

NO DISPLAY, TWO TIMES CAPS LOCK BLINKING

I HAVE A HP PAVILION DV6 -7023TX IT IS NO DISPLAY AND CAPS LOCK BLINKING TWO TIMSE I DNT HAVE WARRANTY ALSO PLASE HELP ME !!!!!!!!!!!!! GIVE ME A good solution ..........
zaid

Caps Lock/Num Lock LED
Component Tested
Error Condition
LEDs blink 1 time
CPU
CPU not functional
LEDs blink 2 times
BIOS
BIOS corruption failure
LEDs blink 3 times
Memory
Module error not functional
LEDs blink 4 times
Graphics
Graphics controller not functional
LEDs blink 5 times
System board
General system board failure
LEDs blink 6 times
BIOS
BIOS authentication failure
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Laptop won't start quickly but power wifi and caps lock light keeps blinking

Hi, it has happened before too but rarely but nowadays it happens on daily purposes.
When I switch on my laptop after leaving it for 8-9 hrs, it won't start up but instead power, wifi and caps lock light keep blinking. I tried removing battery and pressing power button for few minutes but nothing happens. Then i left it like that with lights blinking and after 15 20 minutes it booted. I did same yesterday too. I left it like that it booted after 20 minutes..so My question is "why is this happening? Is it a motherboard issue or is it because of cold moisturous weather here and laptop takes time to get warm up?" Should I show it to HP Service center?

Hi @Nishant5788
Welcome to the HP Support Forums. I see that you are having a problem getting your notebook to boot up normally. As for what is causing the problem the blinking Caps Lock should tell us what is causing the problem as it should be blinking in a pattern. This HP document Computer Does Not Start and LEDs blink has a chart that will tell you what the blink codes mean.
This is most likely a hardware issue and you can give us a call regarding repair options. You can reach HP Total Care at 1-800-474-6836 in North America or start here if you live outside of North America.
Please click “Accept as Solution ” if you feel my post solved your issue.
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Thank you,
BHK6
I work on behalf of HP

Lenovo G560 - Issue with won't boot and black screen after HDD upgrade

Lenovo G560 - Issue with won't boot and black screen after HDD upgrade.
What happen: My laptop was working fine, no blue screen issue, no funny business at all. I bought a new SSD Intel 120 GB and thought it would be a good idea to replace the HDD. I shutdown and disconnected the power adapter, waited a couple of minutes and removed the battery. I opened up the back case and replaced the HDD. And put all the screws back and put the battery back in.
Problem: The very first time I turned the power on, nothing happens besides a black screen. I pressed the dvd drive it works and opens up and closes. I waited for about 30 mins and still has blac screen. When I mean black screen, no bios menu, no logo, just a black screen with the fan sound on.
I have tried these:
1. Unplugged everything - battery, adapter, and pressed the power on button for about 60 seconds, nothing, the laptop turns on with the LED display on for both on and battery LED's. But nothing but black screen, no sound of windows loading just the fan and black screen.
2. I tried putting back my old 2.5" and nothing but black screen.
Thoughts and suggestions?
Solved!
Go to Solution.

Hi Autoexit173,
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with system not booting in your Lenovo G560 laptop.
As you have mentioned that the system not booting, please try to remove the RAM and turn on the system and check if you can hear any beep sound. Also try to clean the RAM slots and check for the issue.
Click here for the steps to remove the RAM and refer page number 40.
Hope this helps. Do post back if issue persists!
Best regards,
Ashwin.S
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HP ProBook 6540b won't boot and caps lock "blinking" continuously.

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