Blinking caps lock 3 times, screen black, f12 wifi light on Hp Pavilion dv7-6c64nr entertainment pc

[Hp-lover2014]

Hp pavilion dv7-6c64nr entertainment PC
Core i7
Windows7

After i switch on its has black screen, caps lock blinking 3 times, function key f12 wifi signal on. But the machine always running (I can hear the sound).


Appreciated if anyone could help. Thanks in Advance

[DavidPK · Accepted solution]

Hi,

First, with reference to the Service Manual on the link below - remove and re-seat your memory module(s).

If the above makes no difference try the following.

Again, with reference to the Manual on the link below, remove one of your memory modules and then see if the notebook will boot.  If it doesn't, try the same module, but in the other slot.  If is still doesn't boot, try the other memory module in both slots, to see if any combination will allow the notebook to start normally.

The procedure for removing these modules is detailed starting on Page 63 of your Maintenance & Service Guide.

If the problem persists, we recommend going to this link about Blinking lights or caps lock blinking: HP Notebook PCs - Blinking Code 

Regards,

DP-K

[Hp-lover2014]

Thank u boss, thanks a lot. The 2nd method help me to find out the problem. My laptop has two memory , one is 2gb another one 4gb, As u say, I remove that 2gb memory module, and hit the power button at a first time my see the light on screen. Now I'm running my laptop along with 4gb memory module. I'll be buy another memory very soon.
If I upgred that 2gb to a 4gb, is that ok for my laptop? Again thank u.

[DavidPK]

Hi,

You're welcome and good to hear the notebook is up and running

You can certainly replace the failed ram with a 4Gb module - if needed, use an application such as CPU-Z to see the specs of your existing 4Gb module ( details are listed under the Spd and Memory tabs ).

Note:  Just to be certain that the problem was with the 2Gb module, try the working 4Gb ram in both slots just to rule out any possible problem with the slot itself.

All the best,

DP-K

[Hp-lover2014]

I checked those 2gb ram every slot, it didn't work. I also used that 4gb memory at CPU-z application.
Thanks a lot again, I appreciate your help.

It's showing such as memory tad-
Dram frequency-665.1mhz
Fsb:dram-1:5
Cas#latency(cl)-9.0clocks
Ras#to case#delay(trcd)-9 clock
Ras#precharge(trp)-9 clock
Cycle time(tras)-24 clock
Command rate(cr)-1t

And SPD tad shows-
Frequency 609mhz-685mhz-761mhz-800mhz

[DavidPK]

Hi,

Although it's gemerally best to install identical pairs of ram, the following is an example of a seperate 4Gb module you could use.

http://www.amazon.co.uk/Crucial-PC3-12800-SODIMM-Memory-Module/dp/B005LDLV6S/ref=dp_ob_title_ce

Best regards,

DP-K

[akash94]

Hi,

My HP Probook 4440s has been showing similar issues such as

• black screen on startup
• power button light on
• caps lock blinks white light with an interval of 3 seconds
• the Wifi light being orange
• the one beside the wifi with a globe sumbol  being white throughout
• the charging light turns white for a split second when I insert the AC cord but then shows blinking orange throughout
• A light just beside the card slot next to audio jack is orange throughout

The fan runs around 6-7 seconds after I start and as soon as the fan starts the caps lock light stops blinking.

I tried removing and re-seating the memory modules with every combination but, nothing worked.

I have two modules both of 4 GB each.

Can you please help ?