Battery not charging on a Toshiba B40

[orientalsniper]

Hello all, I have this motherboard, model: MR10F-6050A2578201-MB-A02 for a Toshiba B40.

Problem is I can't charge this battery. Symptoms are:

1) If I connect battery first and plug power adapter, the charger LED won't light up.
2) If I plug power adapter first and then connect the battery, the charger LED light up, but it won't charge the battery, even though Windows says it's charging.

I have replaced BQ24725A twice and the problem still carries over.

I need help reading its datasheet, since I can't find the schematic for this motherboard.

[dj_ricoh]

Re: Battery not charging on a Toshiba B40

what voltage you got on BQ24725A ?

write the voltage on pins

[orientalsniper]

Re: Battery not charging on a Toshiba B40

When I plug power adapter first and then connect battery (LED charger is amber):

1) 18
2) 18
3) 19
4) 19
5) 3.3
6) 2.7
7) 0.369
8) 3.3
9) 3.3
10) 1.5
11) 10
12) 10
13) 10
14) 0
15) 0
16) 6
17) 10
18) 10
19) 10
20) 19.25

But if I connect battery first and the plug the power adapter, all voltages fluctuate. (LED charger if off)

[orientalsniper]

Re: Battery not charging on a Toshiba B40

SOLVED!

Thanks to dycc: https://www.badcaps.net/forum/showpo...41&postcount=9

Basically, I noticed PIN 3 and PIN 4 of BQ24725 had 19V (PIN4 must have 6V above PIN3), so I was checking all the mosfets and noticed one had a short, replaced it with a different model same channel (couldn't find same model) and it worked.

[Zazaku]

Re: Battery not charging on a Toshiba B40

do you have schematic of this mobo ?

i need it ..
Thank You

[raihan]

Re: Battery not charging on a Toshiba B40

Need bios plz

[mashhoodh]

Re: Battery not charging on a Toshiba B40

need toshiba satellite pro b40 bios... any one plssssss

[thusie80]

Re: Battery not charging on a Toshiba B40

Here is the bios

[razakchokli@gmail.com]

Re: Battery not charging on a Toshiba B40

thoshiba satellite pro b40 shutoff wail booting window

please send the schematic