Toshiba L650 blown video?

[dycc]

Re: Toshiba L650 blown video?

new pch don't waste time

[dj_ricoh]

Re: Toshiba L650 blown video?

new pch don't waste time

the idea is that I will and he will like to know and I think many will like to know or find out how or why is the chip blown. like a symptom a value something is missing and that's why the chip its bad.
you know? I will really like to know how to identify a bad PCH

[dycc]

Re: Toshiba L650 blown video?

the idea is that I will and he will like to know and I think many will like to know or find out how or why is the chip blown. like a symptom a value something is missing and that's why the chip its bad.
you know? I will really like to know how to identify a bad PCH

"The lvds connector was pushed in reversed" . that way he have surely supply pch with 19V .

[hansie55]

Re: Toshiba L650 blown video?

find u6500 and see the voltage ok?
we need to identify everything and compare so we can conclude if actually the chipset its broken.

do you have a lab psu?

U6500

pin 1 = 2,5V
pin 2 = 5V
pin 3 = 5V
pin 4 = oV
pin 5 = 0,2V
pin 6 = 0V
pin 7 = 0,8V
pin 8,9,10,11,12 = 0V
pin 13 = 4,41V
pin 14,15 = 0,97V
pin 17,18,19 = 0V
pin 20,21 = 5V
pin 23,24 = 0V
pin 25 = 0,13V
pin 26,27 = 1,07V
pin 28,29 = 0V
pin 30,31 = 1,05V
pin 32 = 0V

[hansie55]

Re: Toshiba L650 blown video?

While checking for fysical faults, I found that due to the blow, PWR_SWIN#_3 was not connected to the power switch. I fixed it, but no change.

Also, when I connected the HDMI, the TV said ˝no signal˝ .When you unplug the connector and replug it, the screen turns black before he comes back with ˝no signal˝.
Just before he comes up, in the upper left corner, where normally the Post is written, you see very briefly ˝snow˝ like a tv without antenna. It passes so quickly I cannot take a picture.

[hansie55]

Re: Toshiba L650 blown video?

"The lvds connector was pushed in reversed" . that way he have surely supply pch with 19V .

I am not sure about that, because the screen on the other end of the cable will be damaged, but I do not see a return to PCH?

[dj_ricoh]

Re: Toshiba L650 blown video?

plug everything like hdmi vga lcd and see the pins vid0 to vid6 pins26 ->32

"pin 26,27 = 1,07V
pin 28,29 = 0V
pin 30,31 = 1,05V
pin 32 = 0V"

its trying to do something

[dycc]

Re: Toshiba L650 blown video?

I am not sure about that, because the screen on the other end of the cable will be damaged, but I do not see a return to PCH?

according to diagram reverse cable mean that you got 19V(pin 25) on pin 6 (LVDS_DDC_DATA)

PCH was really supplied with 19V

[hansie55]

Re: Toshiba L650 blown video?

plug everything like hdmi vga lcd and see the pins vid0 to vid6 pins26 ->32

"pin 26,27 = 1,07V
pin 28,29 = 0V
pin 30,31 = 1,05V
pin 32 = 0V"

its trying to do something

Values are the same, except pin 30, it went to 0V

[hansie55]

Re: Toshiba L650 blown video?

according to diagram reverse cable mean that you got 19V(pin 25) on pin 6 (LVDS_DDC_DATA)

PCH was really supplied with 19V

You are the Pro, so I assume you right.
I still do not understamd how pin 25 got to pin 6, that's a loop in the screen logic?

[dycc]

Re: Toshiba L650 blown video?

Normally you got 19v on pin 25 to supply screen led . But at the time you reversed lvds cable the 19v went on pin 6 with is directly connected to pch lvds pin

[hansie55]

Re: Toshiba L650 blown video?

Normally you got 19v on pin 25 to supply screen led . But at the time you reversed lvds cable the 19v went on pin 6 with is directly connected to pch lvds pin

I understand, but my way of thinking was different. The supplied voltage is on connector CN3000 pin 25, and if you stick in the lvds cable reversed, the supply of 19V is given to pin 6 of the cable, which will kill the lcd logic, but I don't see it return from there to PCH.
The cable connector was put in reversed, not the CN3000

[dycc]

Re: Toshiba L650 blown video?

i understand, but my way of thinking was different. The supplied voltage is on connector cn3000 pin 25, and if you stick in the lvds cable reversed, the supply of 19v is given to pin 6 of the cable, which will kill the lcd logic, but i don't see it return from there to pch.
The cable connector was put in reversed, not the cn3000

you are right . But short in the lcd logic will return back to pch .

[hansie55]

Re: Toshiba L650 blown video?

Understood, thanks for your patience

[hansie55]

Re: Toshiba L650 blown video?

Hey Guys,

Since it looks like the PCH is dead I stopped repairing this laptop. I do not have the equipment to replace the PCH and the investment to have it done is not worth it.
I thank everybody who participated in this thread for their time and effort.

Thanks Guys, Later..