Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

It has not been repaired yet, since there is no schematic or boardview of this motherboard, it is very difficult. I do not know the values of the components, nor to which signal they respond

The problem has not been, and is not, in the connector confusion error.

Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

Can someone tell me the value of the resistance R391 and C289?
What resistance with respect to mass is there at the indicated point of R391?
If possible, what voltage should there be at that point?...

Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

With R284 removed from the motherboard to isolate pin 4 of the KBC, can I inject 1V in that line, and if it does not heat any component, increase it to a maximum of 3v?

Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

Hello!
Yesterday I received the new KBC that I had ordered and I have soldered it.
I guess when you mention PC144, you really mean PC114, right?

I attach photos with the different measurements with respect to mass.

When PC114 is removed, the short stays on one side of PR121, just like R391 (Zone with overheat mark on the protective plastic of the motherboard)...

Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

With PR121 soldered on motherboard, I have short circuit in D-C of Mosfet PQ22.
When I lift PR121 the short circuit disappears in PL3 and in D of PQ22.
With PR121 removed, S continues shorted to PQ22
On PC114, on the side next to PQ22 I have 0 ohm, and on the other side next to PR121 I have 1 ohm

Re: Toshiba L50-B DABLIDMB8E0 REV. E no enciende - No turn on

Hello, thanks for the answer.
The resistance in PL3 with respect to mass is 0 Ohm.
I tried to inject 1V into the line but no component got hot

Hello everyone!

The laptop was working perfectly, but after disassembling it to clean fan and change thermal paste, the laptop does not respond to power. 3V and 5V are present.

The laptop has a Quanta DABLIDMB8E0 REV board. E, of which there is no available scheme, or at least, I have not found it.

After consulting another website, other users had a problem with burned R391 and corrupted KBC NPCE985LA0DX. In my case, in the area of R391 the protective plastic was perforated from overheating. After checking the area, on one side of the resistance there is...

Re: New Members - please post your introductions here

Hello everyone!
Thank you for accepting and allowing me to participate in this forum.
For years, I have been dedicated to laptop and electronics repairs in general, although many times the lack of time and practice causes a lot of knowledge to be lost.
I have decided to register to participate and be able to help whoever needs it, and on the way, also be able to post for when I need help.
By default my language is Spanish, but in publications, by custom and with the help of a translator, I usually...