Toshiba L350-156 shuts down after 2 seconds display.

[mohkamtech]

Hi,

Toshiba L350-156 displays 1 to 2 seconds and shuts down.
Platform : 6050A2170201-mb-A03

All voltages and signals are ok.

Replaced Nec Tokin C79 with 4 caps of 330u each, as well as C641 220u located under the CPU (+VCCP) with no avail.

Where to dig further, please help!

Thank you

 

[Petnarik]

turns off the backlight? or the laptop?
Nec Tokin C79 replaced when the restart problem..
I recommend to solder 6 * 330 uF

 

[mohkamtech]

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Hi!
Precise, laptop turns off after 1 to 2 seconds.

Add, when lap switched on without battery, led sequence is the following :
PWR_BLED#(D38) on, off, then PWR_OLED# (D37) flashes 2 times, then off
Then a second cycle (same thing happens)
Ends with PWR_BLED# on then lap shuts down and remains only DCIN_BLED#

Will add 2*330uf caps and give feed back.

Thank you

 

[mohkamtech]

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Soldered 6*330 uF caps, but nothing changed!

Does the led flashing sequence as described in my last post give any light on the issue ?

Every new suggestion should be much appreciated !

thank you

 

[mohkamtech]

hi,

Any new suggestion P.S to help resolve the shut down problem !

Hi!
ADD :
Test of Tosh L350 with 5 in 1 Debug Card shows the following codes :
AF-94-78 Then after almost 1 second Lap shuts down. Does code 78 pinpoint a special failure ?

Thank you for responding.