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Search: Posts Made By: shelby5041
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-19-2018, 11:02 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

Thanks

Ill let u know if i decide to try to try to desolder the jumpers
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-19-2018, 07:23 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

those jumper pads you are referring to are very very small..so you say that each one of those tiny blobs of solder are within that blob is connecting 2 pins together? .
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-19-2018, 07:15 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

hi blue

i removed the q6012 out of circuit just for the hell of it..i used a large hot air gun with a tip conversion to 10mm square end..it worked great...i just kept heat on it with a pair of...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 05:16 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

Great information...thanks

If u dont think the issue is one of the mosfets then i will take ur word....and maybe will do some fipurther testing if i get proper tools

There are many of these on...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 03:27 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

i want to remove the 1 mosfet i think may be susp[ect and test out of circuit..it tests bad in circuit but could be false
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 03:26 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

i also am planning on ordering a cheap 2 in 1 didgital temp solder hot air station from eaby so i can control temp....i saw one for cheap like $45 shipped...it should help me in future a lot

but...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 03:24 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

yes i know..i ordered some small ends for my heat gun so i can remove if needed....

and i have tried adding lead solder in past and i can not desolder lead free solder with my cheap soler iron..it...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 08:53 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

fyi.....lead free solder is a pain in the ass.........it does not work with solder wick using my hobby solder iron ...sorry to say
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 08:52 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

hi

wow you are a pretty smart guy....its all foreign to me so im sorry i prob dont have the ability to further troubleshooot

its hard to beleive someone knows that much :)

like i said from...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 06:02 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

i assumed you wanted laptop plugged in on the 2nd part of tests
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 05:58 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

sorry the chart i sent lined up as i was typing but not when i sent it...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 05:56 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

ok here are results..i could not really test Q6000 or Q6001..too small my probe too big...would have to grind end down to do that...but i dont believe those are issues per doing my research i tried...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-12-2018, 05:25 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

hi blue

im going to do some testing in a few..ill get back with results

thanks a lot...your detailed help is very nice
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 08:38 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

i can tell you from testing other day that when power plugged in i tested Q6011 and Q6010

and if my memory is correct
Q6011 i got 0v on all 8 pins
Q6010 i got 19v at pins 5678 and 0v at 1234
...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 08:32 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

love your photos that you lableled it will really help me ....i greatly appreciate it

photos help a lot
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 08:31 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

q6012 is the mosfet that i think is supect during testing in circuit via diode ....testing S-D in which i was told should be open circuit but its not testing open....but maybe since its in circuit it...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 08:27 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

thanks bluemidnight.....ill review when i get a chance

reason i am targeting mosfets is that this is an extremely common issue with this model laptop....there are many main boards on ebay for sale...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 07:14 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

see photo

maybe im getting somewhere?
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 07:08 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

hi

i may have found a suspect part..there is a mosfet alone north of the 2 mosfets and north of the power input that is near a fuse.and just southeast of the battery charging port .i just tested...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 06:57 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

if i cant find a solution soon ill prob just toss board in trash as like i said laptops are dime a dozen and doesnt make sense spening much time or effort repairing if not a quick cheap repair....
...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 06:56 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

hi i did some testing..

with no power plugged in

i tested both mosfets near power input

D-S ..no continuity= ok
i then charged up drain and then D-S now has continuity= ok

so it seems...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 06:40 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

should source pin be 19V power plugged in?

if not, when plugged in what if any voltage values should i see at S G and D pins?
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 06:39 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

here is a data sheet for the 2 mosfets near power input

apparently you asked me to test pins source to drain and pins source to gate..correct?
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-11-2018, 05:49 AM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

thanks

so shouls i test the mosfet that has 0v on all pins or the mosfet that has 19v only on 4 pins and 0v on other pins

are both suspect ?
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 05-10-2018, 10:25 PM
Replies: 39
Views: 475
Posted By shelby5041
Re: Toshiba laptop C855 no power dead

Thanks ill try when i get time

One note

Other day i was probing board and with plugged in i get 19v at input and then there are two mosfets near input area and near 2 fuses....u can see in...
Showing results 1 to 25 of 500

 
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