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Old 07-06-2018, 11:44 AM   #1
Blacktek
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Default Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8 opti

this laptop is shutting down while booting from disk or cd, right after the logo shows up starts loading and goes off.
I have cleaned the board throughly. I added thermal paste. tried different chargers.. still same issue.
When i press the F8 button, laptop stays on.
When i press F2, laptop stays on in BIOS Mode.
Please Help!!
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Old 07-06-2018, 11:55 AM   #2
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

Sounds like something connected to SATA is faulty/short.
What's the motherboard model number ?
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Old 07-06-2018, 12:47 PM   #3
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

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Originally Posted by diif View Post
sounds like something connected to sata is faulty/short.
What's the motherboard model number ?
la-5332p
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Old 07-06-2018, 12:52 PM   #4
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

There's a free schematic available.
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Old 07-06-2018, 01:45 PM   #5
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

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Originally Posted by diif View Post
There's a free schematic available.
thanks, any ideas where i should be looking?
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Old 07-06-2018, 02:35 PM   #6
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

Not sure because the symptoms are weird but I would say you have a defective northbridge. Many RS780M/RS880M are dying lately.
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Old 07-06-2018, 02:37 PM   #7
diif
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

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Originally Posted by Blacktek View Post
thanks, any ideas where i should be looking?
Put la-5332p into Google and click i'm feeling lucky.
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Old 07-06-2018, 02:56 PM   #8
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

Quote:
Originally Posted by piernov View Post
Not sure because the symptoms are weird but I would say you have a defective northbridge. Many RS780M/RS880M are dying lately.
thanks for the input my friend, i was thinking the same thing, i did a little reflow to this chip but it does the same thing.

weird thing is that it stays on forever looking for bootable drives, but as soon as i put in a hard drive it show the windows boot logo then goes off.
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Old 07-06-2018, 03:37 PM   #9
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Default Re: Toshiba L555D Shuts down ONLY when booting from Disk/CD. Stays on in bios and f8

Thanks guys, I Found the Culprid. I was using a 19v. 1.58A, so i switch to an HP 18.5v 6.5A, and its working without any issues.
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