My HP Compaq 6735s will not POST, please help

[shadowbroker]

Hello,

Can someone pretty please help me out a moment?

I have a HP Compaq 6735S laptop, it was working fine, till about two hours ago I turnd it off  then shortly after turned it back on to use it again, however then screen stays black but i can hear the fan spining.

Heres whats going on:

I press my power button,I hear the fan spin-up, little light o nthe power button is on and blue, this is all normal, but something I dont think I have ever seen before is the little blue LED next to caps-lock will flash 5 times, about 2 seconds apart. also the hard drive LED at the front of the laptop just flashes one time every 1 second an orange colour, and im sure when im on windows the LED for thr hard drive is blue.  So the laptop screen just stays black all of a sudden, no post screen or anything, but the laptop isnt actually turning itself off.

Can anyone please give me some advice on what this could be?

[Dragoro]

Sounds like a hard drive problem. Sigh, seems to be a common prob here at the forums

[ClintonTam]

Based on your assessment " but the laptop isnt actually turning itself off.", I suspect your problem could be with your LCD panel.

If you have an external monitor, try the following;

1. Connect this external monitor via the VGA port at the left-hand side of your notebook.
2. Turn ON this external monitor.
3. Turn ON your notebook to see if you can see any image at this external monitor.

You may need to toggle FN+F4 to switch the image from LCD to external monitor.

If you can see image on external monitor, then either your LCD panel or the Inverter at the back of your LCD panel is defective.

If you can NOT see any image on this external monitor, your system is experiencing some kind of failure preventing it to complete the POST sequence. In this case, try to remove one piece of the memory modules from the bottom of your notebook and see if it can boot with a single memory module ( try each memory module in both memory slots and you have 4 combinations to try ) or not. It may take a long time to boot but at least it can eliminate the failure with your memory modules.

Message Edited by ClintonTam on 04-11-2009 11:13 PM

Message Edited by ClintonTam on 04-11-2009 11:15 PM

[kevmel11]

Hello---My 6735S is doing the same thing, but I can get to the login screen. Once I'm there and put my pw in, the system shuts down.

Will this probably be a HD issue?

If so, is there a cable w/a multi-pin end for the old HD w/a USB connector to the laptop so I can copy files?

Thanks,

Kevin

[Mgazza]

Bump. I have exactly the same issue. I have cleared bios(removed backup battery) all drives and ram. Still has this problem. I think its ether cpu or main board not good.

[BerryNYC]

Hello,

Did anybody got the Solution?

I got the same problem as mentionet Shadowbroker

Greetings

[rapaya]

I have sam problem, only at my laptop blue led blinks 3 times, then stops, after some time blinks another 3 times!

I can't find anyware on interent meaning of this blinks. Does anybody knows what is the problem?

[pepe999]

Any beeps?? If not so it's like a hdd problem. There would some beeps if some devices have failed. I had problem with a hdd when my laptop froze on the HP start up screen. I would boot on without the internal hard drive first, using a live cd/dvd/usb of linux or test to boot without the hdd(have to see if the laptop passes the POST)...

[alman0123]

Hello there, i had the same problem, my beautiful laptop was switched on all day till dinner time´, my mother was so kind to ask me to remove my beautiful machine from the dinner table, i think she might have ot a bit upset with me and felt neglected as my sister said she wasnt female. however sorry for the story i am a bit disheartened, i tried dismantling it as i read up on the net how to do so, and was told that removing the individual comonents may get it to work again, it did not. however later on i spoke to a friend of mine and he told me that perhaps removing the cmos battery from the motherboard might enable the device to function again. As removing the battery allows the chips to drain leaving it out for 1 hour should be sufficient however i am leaving it out all night just to make sure, i will post a reply aain tomorrow when i have discovered exactly if it has worked or not. the cmos battery is located underneath the HDD which means comletely dismanteling it, i did this myself as i am a fully qualified ÍT technician, and would not recommend an ammuture to do so however if you do decide to remember to wear an ESD wristband to reduce the chance of killing her more. Below is a link to the website in which i found the guide to dismantle´mine. Good luck and make sure u read my post tomorrow to see if it worked.

http://www.insidemylaptop.com/disassemble-hp-compaq-6730s-6735s-notebook-remove-cooling-fan/

[ClintonTam]

There are a lot of reasons that a notebook will not boot. Without trying to play around with the notebook directly, it is hard to remotely debug any no boot failure.

.

Here is the official HP service guide on trouble-shooting a no boot system.

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http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00372748#doc

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Try to follow the step and to see if it can resolve your failure for you.