No boot, power button blinks once

[iceslab]

Hi,

today I tried to boot my Pavilion 15-cs0006nw and the only thing I could see is a power button blinking once for about 2 seconds and disk LED blinking briefly. No fans are spinning, display is not being powered on. Laptop seems to be not booting at all. I've tried that with and without my AC adapter plugged in (AC LED is working), but it made no difference. I followed all Virtual Agent suggestions, but none of them helped. Since there is no sound or blinking pattern I don't even know what's causing those problems.

[WAWood]

@iceslab 

To determine the cause with hardware failures, you have to be able run diagnostics. We have no way of accessing your PC from here, so we can not do that for you. You have to do it yourself. You do this by pressing the Esc key repeatedly when rebooting and then, when the HP Startup Menu appears, selecting Diagnostics (usually F2) and letting it run.

But if it is NOT possible to run diagnostics, then there is NOTHING more you can do by yourself -- and there is NOTHING we can do.

You will need to have the PC physically examined in a service facility by folks that can run their own diagnostics to determine what is wrong with it. And the problem with that is, while HP does do repair work of some sorts on PCs still under warranty, they generally do NOT do repair work on PCs out of warranty because they are not a general purpose repair facility. You would have to contact them in advance to see (1) if they are willing to work on it, and (2) if they will provide you any kind of repair cost estimate.

Since you live outside the U.S., here is a link to HP Service Centers, by Country/Region: https://support.hp.com/in-en/service-center

If that link does not get you a useful page, then use the main HP link:
http://www8.hp.com/us/en/contact-hp/ww-contact-us.html

Good Luck

[iceslab · Accepted solution]

@WAWood,

Than you for your reply. I was trying to avoid repair service as much as it's possible and fix it myself. I managed to resolve this issue and I am leaving this comment for somebody who will have the same problem as me. Here's what I've done:

I removed RAM completely and booted laptop. CapsLock started blinking in a pattern indicationg RAM failure - that's something different that previously. Then I inserted one RAM module and rebooted PC. I was asked to reset CMOS and I did that. My PC booted fine after that. I swapped RAM modules and rebooted. PC was behaving in the same way as in an original question. At that point I was sure that my problem was caused by a faulty RAM module, but I checked if that could be a RAM slot on motherboard, but it wasn't. It's unfortunate that laptop didn't indicate faulty RAM via blinking LEDs.