HP 6735s won't boot, power LED blinks 7 times

The HP 6735s laptop stopped working. Only sign of life, power LED flashes 7 times after on/off switch is pressed. What's wrong, experts?

Try a hard reset. Sometimes it works and is always the first step to take.
remove the battery and the ac adapter plug from the laptop.
press and hold the power button for fifteen seconds.
install either the battery or ac adapter power and press the power button to attempt a boot into the OS.
If that doesn't work then remove the hard disk to see if it gets past the splash screen and the BIOS whines that it can't find a bootable OS. That would indicate a hard disk failure.
Also worth tying is removing the memory module(s) from the DIMM slots and then reinstalling them. That reseats the modules and cleans some oxidation off the module pins (if there is any)
Another, perhaps a laptopsaver (in a manner of speaking) is the HP Pavilion dv2000/dv6000 and Compaq Presario v3000/v6000 Series Notebook PCs - HP Limited Warranty... Check it and see if your laptop is covered.
regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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This is a phenomenon of these computers.
If you have a computer that won't boot, remove battery, unplug charger. Press powerbutton for at least 20 seconds, insert the power cable, and hold for another 20 seconds. Nothing will seem to happen. Then press power again.
Your LiION battery is close to end of life. Replace. Or get used to doing this. Diag software will warn for failed battery. You will also have a ton of BIOS messages about an obscure error occuring. But you need to have a working Diag partition to make some sense of the meaningless error reported in BIOS.
This has nothing to do with the RTC/NVRAM backup. But it's no reason to not replace it. It costs about 3$ and you can find a 2032 Lithium cell almost everywhere. (3V, 20mm diameter, 3,2mm thick). Located under the harddrive bay cover on the bottom of computer.
If no boot occurs, check that the "lid closed" switch is working. In some environments they can get stucked in "Lid closed" position.
Also if you have access to a can of compressed air (duster), clean the airflow / cooling part from accumulated dust.
These are not exactly the most energy saving computers. They get hot. I have seen examples of plastic chassie parts melting.

PC won't boot, power LED on but, can't power up

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Power LED Blinking Orange/White.
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courtesy of vaiost
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Hello @NoGameNoLife,
I have read your post on how your notebook computer is not able to power on, and I would be happy to assist you in this matter!
Since there is a blinking orange light where the AC adapter plugs into your computer, I recommend following this document on Computer does not start and the LEDs blink or the computer beeps, as well as Using and Testing the AC Power Adapter. This should help to restore the power to your notebook.
If the issue persists, please call our technical support 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
I hope this helps!
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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!

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Quote from: Deathstalker on 12-April-05, 00:14:59
I would try removing the Power Cord from the Power Supply and the Battery from the mobo. Leave them out a good 15 to 20 minutes before putting them back.
If that does not work, try a different brand of RAM for testing purposes.
Deathstalker,
Thanks for the suggestions. I tried removing the battery and power for 15 minutes and replacing, but no luck, same problem. This system was working for two weeks with the PQI RAM modules. Can this compatability change all of a sudden while running and just power down the system?

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Quote from: Juank1 on 10-April-11, 10:26:37
umm have you connected the power cable for CPU? sounds rare question for me, sorry .. All I know is CPU is seated into socket where get power. Power ATX 24 pin power connector to mainboard is properly connected. or are you talking about ATX 8 Pin power connector JPWR2? is it that?
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Quote
or are you talking about ATX 8 Pin power connector JPWR2? is it that?
yes

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maybe ur power led and hd led got switched around by accident, check the wire, if you think its right but it still does it, try switching the power led wire with the hd led wire.

Power led blinking

I have a hp 5175ea, some days I can not turn on the computer by pressing the power button as it flashes without stopping.
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Hello @NoGameNoLife,
I have read your post on how your notebook computer is not able to power on, and I would be happy to assist you in this matter!
Since there is a blinking orange light where the AC adapter plugs into your computer, I recommend following this document on Computer does not start and the LEDs blink or the computer beeps, as well as Using and Testing the AC Power Adapter. This should help to restore the power to your notebook.
If the issue persists, please call our technical support 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
I hope this helps!
Regards
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!

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My HP 630 notebook is not powering on by battery neither by power adapter connected. If I press power button when its connected the L.E.D besides the power plug blinks 3 times. This happens till the battery is charged; if the battery is not charged these L.E.Ds don't even light up.
I expect the laptop to power on(when connected to wall outlet) even if the battery is out. Can someone kindly suggest what could be wrong here?
Thanks a bunch in advance
Regards
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well, I have tried combo's of all 8 sticks in all different slots... sooo guessing mother board..
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You can try to just press F1.
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Last edited by Neburski (2014-02-19 12:35:00)

HP 6735s won't boot, power LED blinks 7 times

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