Question about Sony MBX-49 ASSY Motherboard

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There are hosts of problem in my sony vaio VGN-S170P laptop first is after trying many times by pressing the power button on and off it gets on. it works fine for about 10 min then all of a sudden it hangs, and all the icons get bigger to their maximum size and the display graphics turns ugly and after checking the display property it shows 8 bit color. it flashes a message "micrisoft windows encountered an error please save your data and reboot the to restore full functionality"

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  • mailformasho Jan 04, 2009

    already restored to its factory condition using restore cds which came with it, also checked the ram one by one but of no use

    checked by removing and reconnecting the battery but of no use



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"pressing the power button on and off it gets on", is a typical problem for these boards.

Ridiculously, if you leave it alone for about 3 months it will start right up!

I suspect cooling fan is intermittent (sticky) and damages ram and possibly other on-board components from the excess heat.

For your video problems it sounds like it really got too hot!
(Fan cools both processor and on-board video chip, memory is on other side of the damaging heat).

Posted on Feb 16, 2009

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Backup your data and restore the laptop to original condition with the disks that come with it

if that dosnt work you may need to have your ram checked or replaced.


hope this helps

Posted on Jan 04, 2009

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How do I access the boot menu at startup, Sony vaio vgn cr190 Win XP?


You can either try to spam the F12 button upon start-up to directly select which device to boot from, or either F4 or Delete are the typical keys used to get into the BIOS and you can change the boot order from there to automatically select a CD drive device if it ever detects one.

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Want the manual for sony vgn-n38e


Link to the Service Manual, Donald,

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-sony

That Sony VAIO VGN-N38e, is part of the Sony VAIO VGN-N series of Notebook PC's.

Scroll down to the 8th line that begins with the blue -> VGN-A
Scroll across, and click on the blue -> VGN-N

PDF file. and the computer you are using now has Adobe Reader on it, which uses PDF files.
May take up to 30 seconds after you click on the file name (VGN-N), before the first page comes up.
The file is downloading in the background.

That is the Service Manual. It doesn't have board level component replacement.

Is there a board level component that you feel needs replaced?
What are the symptoms of the laptop?

Power issues, if not the AC adapter, (Charger), or DC Power Jack; are related to the Power MOSFET's on the power circuit of the motherboard; and may also have bad MLCC's in that circuit.
(Multi-Layer Ceramic Capacitor)

[DC Power Jack is part of the circuit. Where it is attached look at those P.MOSFET's.
Example using HP Pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

These series of HP's use the Fairchild Semiconductor International - FDS6679 - Power MOSFET, and the Alpha & Omega - AO4407 - P.MOSFET.

Looking at the second photo down, with the AO4407 circled in Yellow; look at the small rectangular object to the immediate right, that has a wide dark band on it.

There is one above it of the same size, and one above that one.
There is also one to the right of the top one.

These are MLCC's.

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

Scroll down.

http://www.mouser.com/Search/Refine.aspx?Keyword=AO4407

AO4407 has been phased out. List shows cross-references.

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wrjcZ1z0x565

Just 4.7Mfd examples at 16 Volts.
Do not know the values of yours ]

Electrolytic Capacitor/s replacement?

OH, just cleaning the laptop out?
S'okay I was just letting you know board level replacement is possible.
(Does kinda' depend on your de-soldering/soldering skills, though)

Reply in a Comment.

Regards,
joecoolvette

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just search in internet if you dont know....
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