• Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

It is currently 20 April 2024, 12:01

Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
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 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).

#1 Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by valieromarco • 23 April 2020, 02:41
This motherboard was spilled by water, there is no big damaged on motherboard.
It arrived as dead, but I turn it on for the first time and it power in with video, so I cleaned all motherboard but now it power on but no image.
No CPU power.
I have not boardview file.

Image

Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by Google Adsense [BOT] • 23 April 2020, 02:41

#2 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by matic • 23 April 2020, 09:51
valieromarco wrote:Motherboard MCLA BA92-09093A
Hello!
This code is probably from the label. There should be another code (BA41-01xxxx) directly on the motherboard. It is probably located near the fan hole on the board.

Please, post a clear picture of spilled area of the board.

#3 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by valieromarco • 23 April 2020, 12:57
Image

This is the motherboard code


External area was spilled with no any damaged components, inside area was more damaged but no burned components, just oxidation.

Image

#4 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by matic • 23 April 2020, 13:21
valieromarco wrote:I have not boardview file.
BoardView for motherboard revision 1.0 is available on the forum. I think it should fit with your board. ***click***

Highlighted two components seems corroded, also check all other components for signs of corrosion. Start with replacing all corroded components.
Check, if there are spill residues between the pins of QFN chip. If so, it is need to remove the chip from the board, cleaned the board thoroughly and solder the chip back to the place.

Image

#5 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by valieromarco • 23 April 2020, 21:50
I cleaned and resoldered but issue is still there.
I checked these coils


Image

#6 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by matic • 23 April 2020, 23:31
This resistance seems a bit too low. The GPU may be damaged.

Measure the resistances to ground on all other coils.

#7 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by valieromarco • 24 April 2020, 00:04
L501 and L502 = 4,4 ohm with CPU
L504 = 6,6 ohm with CPU
L509 = 186 ohm

#8 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by matic • 24 April 2020, 10:12
Measure the power consumption (in mA) of the board before and after pressing to the power button.

#9 Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by valieromarco • 24 April 2020, 13:21
Ok I’m out now I will check but I also checked ic 51117 (ddr power) it was corroded by water I don’t have right voltages, no power good no V out.

Power consumption is 0 A before and 0,11A after

Re: Samsung NP550P5C Motherboard MCLA BA92-09093A MCLAREN REV 1.2 POWER ON NO VIDEO

by Google Adsense [BOT] • 24 April 2020, 13:21
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
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