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Toshiba C640 No Power....

  • Автор темы Criz
  • Дата начала
25/3/21
1
0
1
31
Sri Lanka
Hi All!

Number The Discussion Board: 6050a2423901-mb-a02 (CT10R)
Issue: Not Powering on

When connecting power supply, it showing 3.3V and 5V. And also 3.3V on power button. When power it Pressing goes to 0V and coming back (ON pin KBC)

I checked all the coils and most of the caps and confirmed that there is no shorts. Cleared the CMOS also. Same ..

After many attempts I was able to power it on like this. Before connect power jack, I input 3.3V from a DC supply to RSMRST # pin on KBC and then connect the power jack. It automatically turned on before pressing the power

when I connect the power jack screen on and restart one time and then working well. No matter how many time I shutdown and restart, it working well. But its only working like that with power jack connected (from power button). As soon as I removed the power jack it will not turning on with button and I need to inject 3.3V again to RSMRST # pin for one time again.

Already changed the resistor connected to the RSMRST # pin. But same ..

Any idea? Thank you!
 
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