TOSHIBA L500-1QE LA-4982P no power

[manol278]

TOSHIBA L500-1QE KSWAA LA-4982P REV 1.0 with VGA ATI 216-0728014
no power, no led signal.
PQ8 MOSFET-
PIN 1 - 18,7
PIN 2 - 18,7
PIN 3 - 18,7
PIN 4 - 18,7
PIN 5 - 18,2
PIN 6 - 18,2
PIN 7 - 18,2
PIN 8 - 18,2

PQ9 MOSFET-
PIN 1 - 18,7
PIN 2 - 18,7
PIN 3 - 18,7
PIN 4 - 18,7
PIN 5 - 3,2
PIN 6 - 3,2
PIN 7 - 3,2
PIN 8 - 3,2

U46 BIOS MX25L160
ALL PINS - 0


PLease help me! Thanks.

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

TOSHIBA L500-1QE KSWAA LA-4982P REV 1.0 with VGA ATI 216-0728014
no power, no led signal.
PQ8 MOSFET-
PIN 1 - 18,7
PIN 2 - 18,7
PIN 3 - 18,7
PIN 4 - 18,7
PIN 5 - 18,2
PIN 6 - 18,2
PIN 7 - 18,2
PIN 8 - 18,2

PQ9 MOSFET-
PIN 1 - 18,7
PIN 2 - 18,7
PIN 3 - 18,7
PIN 4 - 18,7
PIN 5 - 3,2
PIN 6 - 3,2
PIN 7 - 3,2
PIN 8 - 3,2

U46 BIOS MX25L160
ALL PINS - 0


PLease help me! Thanks.

the Voltages on PQ8 PQ9 not correct output pin 5678 of PQ9 must be 18.2V
first test you Fets for any short & Ohms

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

PQ8 and PQ9 removed and replaced
PQ8 5678 to GND is about 58kohms
PQ9 5678 to GND is about 0,4kohms

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

Test Voltage on PR67 both sides , try to find in GOOGLE how to test P-Channel fet S D G you have to check between don’t replace if you’re not sure

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

I cant find PR67....

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

ok then voltage on all legs PQ19

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

ok then voltage on all legs PQ19

Voltage on all legs PQ19

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

PU1 A IC pin1 you should get 3.3V find that IC, PQ19 gate voltage should be 3.3V PACIN, what is the charger you are using try with another charger if you have uplode both side of the Mob in 2 pic

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

PU1 A IC pin1 you should get 3.3V find that IC, PQ19 gate voltage should be 3.3V PACIN, what is the charger you are using try with another charger if you have uplode both side of the Mob in 2 pic

PQ19 gate voltage 18V???

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

PQ19 gate voltage must reach 3.3V this voltage come from LM393 PU1 comparator pin 1 3.5V through the Power diode PD1 one side 3.3V test the Voltage & PR67 but the register he’s not marked anywhere you have to do a continue to test to find out one side of PD1 is connected to that register PR67

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

PQ19 gate voltage must reach 3.3V this voltage come from LM393 PU1 comparator pin 1 3.5V through the Power diode PD1 one side 3.3V test the Voltage & PR67 but the register he's not marked anywhere you have to do a continue to test to find out one side of PD1 is connected to that register PR67

Sorry but only you can help me...

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

voltage on PD1 ? put the Multimeter meter in continuity mode and test how may Restarters of next to PD1 connected with the it

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

voltage on PD1 ? put the Multimeter meter in continuity mode and test how may Restarters of next to PD1 connected with the it

For a strange reason when i test Restarters of next to PD1,after that the laptop work....
Maybe a short somewhere...??/

[manol278]

Re: TOSHIBA L500-1QE LA-4982P no power

techtiger thank you for your help...

[Techtiger]

Re: TOSHIBA L500-1QE LA-4982P no power

no worries ,breaking solder joints may be the cause in that area you may have to heat up with some flux over heating might kill the Mob