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Replaced Laptop Motherboard, Now It won't Turn on! (water dmg)


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#1 JoeyZhang

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Posted 27 May 2015 - 12:51 AM

Hi all,
I recently replaced spilled water all over my laptop. I make the mistake of not waiting for it to completely dry and attempted to turn it on.
So after, accessing the damages, I took my Lenovo Y50 to a certified technician who told me that the motherboard was damaged. I decided to replaced the motherboard by myself (purchased Lenovo refurbished from Ebay) and proceeded to install it. 
When I turned it on, the LED lights up to signal that it is being turned on, however the fans do not start, my keyboard does not light up, my display does not turn on. (Basically, only the power button LED turns on for about 2-3 seconds, then shuts off)
 
1. I made sure the ram, harddrive, thermal paste, screws, cords etc was installed properly.
2. When I charge my laptop, the LED lights up to signal that it is charging.
3. I attempted to turn on my laptop without the battery, to this I received the same 2-3 second LED and nothing more. 
 
Does anyone have any recommendations of what is wrong with my laptop?
Can we narrow it down to a specified region? 
Thank you for your time guys, I really appreciate it. 


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#2 Citizen_WD

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Posted 27 May 2015 - 08:19 AM

HI there JoeyZhang, 
 
Sounds like your graphics card, monitor (LCD screen), or worse - the CPU has been damaged as well. Are you sure that the refurbished unit that you bought is 100% working?  Can you hear any beeps when turning on? Try connecting the laptop to external monitor/TV and see if anything happens ? Have you replaced the CPU as well as the motherboard? It will be extremely hard for anyone to give you specific advice but from what you said - I would just take it to a specialist if the short troubleshooting I gave you doesn't work (if trying another monitor doesn't work) Hopefully it's just a bad connection somewhere (and water can cause that), but expect the worst. 
 
Hope your problem will be solved soon, Citizen_WD

Edited by Citizen_WD, 27 May 2015 - 08:21 AM.


#3 JoeyZhang

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Posted 27 May 2015 - 11:47 AM

 

HI there JoeyZhang, 
 
Sounds like your graphics card, monitor (LCD screen), or worse - the CPU has been damaged as well. Are you sure that the refurbished unit that you bought is 100% working?  Can you hear any beeps when turning on? Try connecting the laptop to external monitor/TV and see if anything happens ? Have you replaced the CPU as well as the motherboard? It will be extremely hard for anyone to give you specific advice but from what you said - I would just take it to a specialist if the short troubleshooting I gave you doesn't work (if trying another monitor doesn't work) Hopefully it's just a bad connection somewhere (and water can cause that), but expect the worst. 
 
Hope your problem will be solved soon, Citizen_WD

 

 

Thanks for the reply.

My CPU was attached to the motherboard, I bought both the CPU and Mobo completely refurbished.

Lenovo Y50-70 Laptop Motherboard w/ Intel i7-4700HQ 2.4GHz CPU

 

There are no beeps at all. Only the LEDs indicating it is on lights up as well as the LEDs indicating it is charging. 

Another monitor didn't seem to do the trick, although I do agree that it is most likely a bad connection somewhere.

Just having difficulty narrowing it down to where ...



#4 JohnC_21

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Posted 27 May 2015 - 03:02 PM

I remember seeing a video where a bad keyboard kept the computer from booting. The poster disconnected the keyboard from the motherboard and it proceeded to boot. I have also seen a bad CMOS battery keeping a laptop from booting. I would pull the RAM modules if these were the original and see if you get a post beep. Can't say if these are your issues. Just throwing out some thoughts.

 

Edit: Here is the service manual for the Y50 if you do not have it.


Edited by JohnC_21, 27 May 2015 - 03:07 PM.


#5 JoeyZhang

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Posted 27 May 2015 - 11:43 PM

Greatly appreciated, will test keyboard and separate components tomorrow! 

 

Update: Dropped it off at a technician's place, will be giving me a free diagnostic :)






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