What does a blinking green light on a Samsung series 9 mean?

Nicolas Leroux

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May 13, 2013
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TL;DR:

What does it mean when the charging indication LED on the NP900X4C (aka Samsung Series 9) blinks green?

I am talking about this light: http://i.imgur.com/YRDWPJR.png

Long story:

About 8 months ago some dick poured water on my laptop then closed the lid and bailed. The funny thing is I think that it would've been all right if the laptop had not been plugged into the AC-DC power adapter. As expected there was a nasty short and a bunch of corrosion around the area where the power adapter meets the motherboard. I dried the laptop out by soaking up as much as I could then putting it in rice for a while, then cleaned the corrosion off of the motherboard with the help of vinegar and rubbing alcohol. After all of that, the laptop booted and ran fine with the exception that the keyboard was sometimes sending 2 characters when some keys were hit + some other weird things that keyboards do after water gets on them. My experience is that these issues usually go away after a few stubborn water molecules evaporate.

Only problem is that it wouldn't charge. So I then explored my repair options and since Samsung told me that repair would cost the price of the laptop and that buying a new motherboard from them would cost the price of the laptop minus $300, I just went on ebay and bought a replacement for $450. Still a bit much considering I got screwed but a helluva lot better than the grand I was looking at through Samsung.

In between the beginning of this and now, the battery had died and since I couldn't charge it myself I had to borrow a friend's Series 9 to charge it in. It's important to note here that I put the battery in my friend's laptop and charged it to full without any problems.

A bit later I got the motherboard and there were some slight damages to it. First, the pipe that takes heat from the CPU to the fan was a bit bent: http://sdrv.ms/126Sm6f I figure this resulted from shipping and it shouldn't cause any problems anyways.

Somewhat more concerning was that the latch for one of the ribbon cables was missing: http://sdrv.ms/126NxK9

Here's the old mobo for comparison: http://sdrv.ms/167fxn8

Bonus points if someone knows what that cable does, but after close visual inspection, I don't think that the missing latch is any cause for serious concern. This is nice because it would uphold the seller's claim that the motherboard is working.

After I plugged in all of the connectors correctly and plugged in my fully charged battery, the symptom described under the 'TL;DR:' began happening. The LED doesn't stop blinking if I plug in the AC-DC power adapter.

And here I am, trying to figure out if this problem is something I can fix or if it's something wrong with the motherboard I bought. If it's the latter, I've got about 10 days to return it so I would really appreciate any gems of wisdom that could be dropped on this dire situation.

Thanks for your time guys,
Nico
 
Not to be lazy, but here is the user manuals and - more importantly in this case - the troubleshooting manual: http://www.samsung.com/us/support/owners/product/NP900X4C-A01US

The troubleshooting guide should tell you what various nuances mean, then you can take things from there. :) I hope that suffix (A01US) is the appropriate one for your model/series.

There is also this guide if you want to really get crazy :p : http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?idx=44969&modelname=NP900X4C&modelcode=NP900X4C-A01US&session_id=RR2G34TNQvkLJLLBLTnLVTldknD2RcsnGJpJxF9GQB7pZkpyz47W%211316460487%212039103633%211368487558723&from_osc=&__ncforminfo=LW6Szg3aYssFkaGPJvklgmWas0hmbqSWIs88-kQ_YF_T12Y9ebIrmK0LmvaoMPcE8G-KNmWVswp-BzQx5Gr83l833zzeOHTyjkKtISCUUHFkkaw8L1jgqB4gEGh-ttLR
 

Nicolas Leroux

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May 13, 2013
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Sadly both the user manual and the troubleshooting guide say nothing about this light :( I even called Samsung customer support and asked them directly but they couldn't tell me..
 


What?! "couldn't" as in they didn't know? You might need to call them again and escalate your inquiry. There has to be a rep that knows the board well enough to tell you what the indicator light means. Usually a blinking indicator LED is a substitute for a BIOS/POST speaker, so its purpose shouldn't be ambiguous or beyond their knowing.
 

Nicolas Leroux

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May 13, 2013
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You're right, it was serious BS that they couldn't answer a simple question like that. I'll call again right now and try to escalate.

UPDATE: Same story. The guy was really nice bout it but he pretty much just told me "that's out of jurisdiction". Apparently they only deal with the simplistic derpy tech problems and once you're trying to do anything involving the laptop being open they become no help.
 


Wow. I suppose they don't want to be held accountable if you accidentally damage it further, which is understandable, though all you're asking for is what the indicator light means. Is it under warranty still?
 

Nicolas Leroux

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May 13, 2013
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I wish man, the water damage broke the warranty so my only two options are to either fix it or sell it for parts. I'm still sticking to the former.

I noticed that the price of first party Series 9 motherboards went down a lot. My guess is that Samsung is end of lifing this model, so I took the opportunity and returned the motherboard to the guy on Ebay and bought one of the first party motherboards from samsungparts.com. Fingers crossed that this one works as expected.
 

killkenny

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May 31, 2013
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Hey im having this exact same problem but no water damage.

It started after I charged my phone using the usb port and it completely drained the battery on the laptop

Any news about what the cause was?...