Toshiba Satellite L655 (HannStar J MV-4 94V-0)

[rtstorm]

Hi, i got this notebook with no power led on. I assume that the power jack is bad but jack is fine. i got 19V on board, but no sign of power when i press power switch. Can someone help?

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i test all fuse they are OK

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

when push start button on battery, orange LED (battery empty) blink, and that is it, no charging LED and no power LED

[spidey]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

first of all find the schematic. start measuring voltages in power circuit mosfets. But you also need to measure the current.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

Hmm how can i measure current on mosfets?

[spidey]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

not mosfets but entire circuit. To solve motherboard faults, you need an adjustble regulated power supply unit with current meter.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i found in this thread the same problem, i think here is bad MAX17435ETG+ Battery Management High f SMBus. And i found the schematic od mobo. So there is no power, all led-s are dead except blinking orange (like battery low). What do you think?

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i replace MAX17435ETG+, but still no power , i check L6000 now its 0V.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i don't see that any voltages other than 1V are going into the U6000 IC, i have 12V on one side of Q6002 and other side is 0.86V.

[dj_ricoh]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i had a toshiba satellite like this and when i place the ram in a wrong possition the led blink and no power.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

I dont thin this is the same issue. Notebook wont charge at all, with ram or not

[dj_ricoh]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

where are the other pages of the scheme?
did you see that 24v dc input? do you have a 24v ps for this notebook? :O

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

No, i have 19V ps (standard notebook charger)

[rievax_60]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

If there is 12v on the Drain of Q6002, it should be 19v from the charger. Why is it only 12v?
Or is the 12v on the Source from the battery?

[Tuomo]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

No, i have 19V ps (standard notebook charger)

Firts battery OFF, AC ON.

Measure Q6002 all PIN.

[Francisco.s]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

i don't see that any voltages other than 1V are going into the U6000 IC, i have 12V on one side of Q6002 and other side is 0.86V.

If you have 12v on one side of Q6002, (I think it comes from battery) probably D6005 or L6001 (from 19v side) could be open. Check it and post.
Cheers.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

one side that come from adapter is 0.56V, and other side is 0V

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

this is without battery

[Tuomo]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

this is without battery

Ok. There is no AC voltage.

Measure L6001 PIN1, PIN2 and D6005 PIN1, PIN3.

[rtstorm]

Re: Toshiba Satellite L655 (HannStar J MV-4 94V-0)

L6001 PIN 1 and PIN 2 =19V, D6005 PIN1 and PIN2 = 19V