My laptop when I power on, shows a blank black screen and the caps and num lock lights are blinking and the fan is running.

Question edited for proper spelling of maker name and better English.
Question moved to Fujitsu category.

No model, service tag details given, so generic help.

Re: E744 - NumLock flashing Remove the battery and the ac adapter and press the power button again for a view seconds. After that connect the ac adapter first an try again if you can start your device. If you are facing the same problem again you should contact a service partner regarding a repair of your notebook.
May 5, 2015

E744 - NumLock flashing - Fujitsu Support Forum

Fujitsu https://forum.ts.fujitsu.com > forum > viewtopic

Fujitsu S6520 screen blank with Num lock blinking

Fixya https://www.fixya.com > support > t5988599-fujitsu_s...
Press and hold the power button for 30 seconds solid. Then, do not put the battery back in, just the power cord. Try to start the computer, if it starts, ...

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  SOLVED: Fujitsu S6520 - when i start, the num, caps

  https://www.fixya.com > ... > Fujitsu > LifeBook
  Blink codes are often displayed after a user adds memory to the computer but does not seat the module properly. The LEDs may also blink error codes if a ...

That is a security configuration on HP Laptops, depending on the way they blink is the problem your machine has.

Here is the web page where this info is posted, in case you need more info, hope this helps you to determain.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01443366&lc=en&dlc=en&cc=uk&lang=en&rule=26781&product=3816592
This document pertains to HP Notebook PCs with the HP Unified Extensible Firmware Interface (UEFI) beginning in late-2008. On startup, you may see a blank screen. If the diagnostic utilities detect a specific problem with hardware components, the fan turns on, but the screen remains blank. To help identify the cause of the problem, various LED lights on the keyboard blink a series of codes. The diagnostic utilities use the LEDs near the Num Lock or Caps Lock keys to blink a series of error codes. At the end of the series the blinking stops. The pattern of blinks will occur any time you attempt to start the computer until the error is resolved. Battery power LED blinks The Battery power LED indicates the condition of the power supply. When starting the computer, or when the computer is in operation, use the chart to identify the power condition. Battery Power LED Component Tested Error Condition Battery power LED off, and Caps Lock/Num Lock off Battery or AC Adapter AC adapter not connected or failure

Battery low charge or failure Battery power LED blinking Battery Insufficient charge on the battery When new computer is used for first time, the white LED light for the AC power connector blinks. Battery is still in "Shipping Mode", the light continues to blink even when AC power is connected.

To resolve, turn off notebook, connect AC power and allow battery to charge for at least 30 minutes, then start computer. LEDs near Caps Lock and Number Lock keys blink when starting notebook The LED lights near the Caps Lock and Num Lock keys will blink if an error is detected during the start up process. The LEDs will blink a number of times in a sequence and then stop. The number of blinks in the sequence indicates what component caused an error when it was being tested during start up. If the LEDs stop blinking and the computer does not start, you can press the power button again to repeat the tests. Count the number of blinks, and use the chart to identify the error condition. Knowing the number of blinks is helpful when you contact an HP support agent for technical help. 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

How many blinks between pauses if there are pauses? Look at this chart.
Number of Blinks or Beeps Location of Blinking LEDs Component Being Checked Error Condition Continuous glow Battery power LED Battery The AC adapter is attached and the battery is charging, but does not yet have sufficient charge to power the notebook. 1 Caps Lock/Num Lock CPU CPU not functional 2 Caps Lock/Num Lock BIOS BIOS corruption failure 3 Caps Lock/Num Lock Memory Module error not functional 4 Caps Lock/Num Lock Graphics Graphics controller not functional 5 Caps Lock/Num Lock System board General system board failure 6 Caps Lock/Num Lock BIOS BIOS authentication failure Continuous blink AC power adapter LED Power adapter Insufficient power

If screen and external monitor do not work then the issue lies with the video section of your laptop. The video chip is soldered onto mo bo and there is noway you can replace it if bad. Kiss your laptop sayonara, salvage the hard rive and memory and get yourself a new laptop that works. And avoid HP - their customer service is non existent after warranty runs out. They refer you to a forum or tell you to get another unit - an HP of course!

It would seem that your BIOS has become corrupted somehow. First try entering your BIOS setup. I believe for HP computers when you press power tap the F10 key until it opens. There you can try to reset them in some fashion and save. Try rebooting. If that fails then remove the battery and repeatedly press the power button for about 10 seconds.. (make sure it is also unplugged, this is to discharge the power from the system) then replace the battery and try booting again. Otherwise it would seem that you might have tried to load the wrong BIOS into your laptop. Check with HP then if you are still covered or not. :/

Hello good day,sir
My compaq presario cq40..is powering on but blank on the screen and caps lock and num lock blingking only.I try ready so many time but everything are not meaning for me that's why i need your help,sir.please,give me some advice for power back.
Thank sir.

Number of Blinks or BeepsLocation of Blinking LEDsComponent Being CheckedError ConditionContinuous glowBattery power LEDBatteryThe AC adapter is attached and the battery is charging, but does not yet have sufficient charge to power the notebook.1Caps Lock/Num LockCPUCPU not functional2Caps Lock/Num LockBIOSBIOS corruption failure3Caps Lock/Num LockMemoryModule error not functional4Caps Lock/Num LockGraphicsGraphics controller not functional5Caps Lock/Num LockSystem boardGeneral system board failure6Caps Lock/Num LockBIOSBIOS authentication failureContinuous blinkAC power adapter LEDPower adapterInsufficient power

First you need to determine how many blinks you are getting when you try to power on the laptop. Check the blinking codes below and reason behind that for HP Compaq laptops Blinking battery power LED Battery Insufficient charge on the battery Blink: 1 - Caps Lock/Num Lock - CPU CPU not functional Blink: 2 - Caps Lock/Num Lock - BIOS BIOS corruption failure Blink: 3 - Caps Lock/Num Lock - Memory Module error not functional Blink: 4 - Caps Lock/Num Lock - Graphics Graphics controller not functional Blink: 5 - Caps Lock/Num Lock - System board General system board failure Blink: 6 - Caps Lock/Num Lock - BIOS BIOS authentication failure You need to first Remove the memory module (RAM)- Try to power on the laptop ? then again reset it and try to power on. Check whether it is coming on or not. try the same procedure with Hard drive. If laptop is getting power on after removing one of the device then we can be sure that that particular device is faulty and we can change that then? Let me know if you find any difficulties doing this.. I hope this will help you to get it work. Plz vote for me..Dreamkam

Hi,

First you need to determine how many blinks you are getting when you try to power on the laptop.
Check the blinking codes below and reason behind that for HP Compaq laptops

Blinking battery power LED Battery Insufficient charge on the battery
Blink: 1 - Caps Lock/Num Lock - CPU CPU not functional
Blink: 2 - Caps Lock/Num Lock - BIOS BIOS corruption failure
Blink: 3 - Caps Lock/Num Lock - Memory Module error not functional
Blink: 4 - Caps Lock/Num Lock - Graphics Graphics controller not functional
Blink: 5 - Caps Lock/Num Lock - System board General system board failure
Blink: 6 - Caps Lock/Num Lock - BIOS BIOS authentication failure

Plz get back so I can suggest you the steps to resolve the issue.

Dreamkam

Well hellonihar, As far as your issue is concerned it seems to be some hardware issue. LED
Component
Error Condition
Blinking battery power LED
Battery
Insufficient charge on the battery
Blink: 1 - Caps Lock/Num Lock
CPU
CPU not functional
Blink: 2 - Caps Lock/Num Lock
BIOS
BIOS corruption failure
Blink: 3 - Caps Lock/Num Lock
Memory
Module error not functional
Blink: 4 - Caps Lock/Num Lock
Graphics
Graphics controller not functional
Blink: 5 - Caps Lock/Num Lock
System board
General system board failure
Blink: 6 - Caps Lock/Num Lock
BIOS
BIOS authentication failure