Toshiba Satellite - Locks up when plugged in

[zinksoft.net]

Re: Toshiba Satellite - Locks up when plugged in

I just replaced the troublesome with this received today http://www.ebay.com/itm/330953629462...84.m1497.l2649 wait almost 2week. take me 3hours to done the hard work. have take some photo, too bad the image is blur, i use middle size fingernail clippers to broken the top cover of the NEC/TOKIN 0E907 from the top side. then slowly remove the internal solid content until the metal bottom remain. i keep the metal bottom remain tested with multimeter for current conductors, then 3 right and 1 left SMD Tantalum Capacitor 330uf 2.5v. each soldering double check using multimeter to be sure. i also remove the wifi card, modem card and unplug the mic and webcam from the mainboard. i have uploaded some of the tool i use to completed the hard work, Vacuum Cleaners is to suck up all the NEC/TOKIN 0E907 very very small remain, because it fly around the mainboard when you removing the NEC/TOKIN 0E907. have to take double caution about the small electronic components just beside the NEC/TOKIN 0E907 and each soldering need to be fast, don't put the soldering iron too too long on the smd or the board, because i just remove the toshiba L300 top cover. i use 60/40 rosin core, caution don't drop any unnecessary Solder on the mainboard.

[Mad_Professor]

Re: Toshiba Satellite - Locks up when plugged in

I got a A305-S6825 with Net/Tokin OE907,
Laptop restarts every-time you try to load operating system with AC brick plugged in, also hangs if it doesn't restart.
Works fine on battery.

Don't see any other issues, my guess is this PoS nec/tokin cap.

What should I replace with? ordering from digikey.

Should I get these?

http://www.digikey.com/product-detai...26382067620546

[whaldsz]

Re: Toshiba Satellite - Locks up when plugged in

Yes that one from digikey is ok.

[Mad_Professor]

Re: Toshiba Satellite - Locks up when plugged in

Yes that one from digikey is ok.

Ok, thank you, should I get 4 or 6 of them?

[whaldsz]

Re: Toshiba Satellite - Locks up when plugged in

4 is enough.

[stryed]

Re: Toshiba Satellite - Locks up when plugged in

Hi all. I replaced my NEC128 with this
http://www.ebay.com/itm/4x-SMD-Tanta...item4d0e1a06e2

And followed you guys for instructions for my first ever time using a solder iron.
My first solder failed because I tried putting the 4 caps diagonally and that turns out too difficult for my set of skills. I cleaned the middle (-) zone and used that instead to put them parralel.
Working fine so far!

Thanks again!

[stryed]

Re: Toshiba Satellite - Locks up when plugged in

Well I spoke too soon. Restart started again so instead of adding extra caps, I decided to redo it. I also bought a multimeter and I think I've damaged the PCB.
There is continuity between + and - and having trouble removing the solder in between, I became posessed and started scraping off too hard and ended up touching the copper. situated inbetween + and -....The dark green line seperating one + from - region is now copper!

I'm guessing this is gameover and continuity will never be removed? Ive used 1,6m of desolder braid in between the rift I made unsuccessfully.
Anyway to fix this? or do I need a new MB?

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

The low resistance reading is caused by the CPU being in the socket. The dark green coatiing is lacquer. Sometimes we scrape it off purposely.

[stryed]

Re: Toshiba Satellite - Locks up when plugged in

I'm getting 0.7ohms between ++,-+,-- , and multimeter shows continuity between all. With the caps, I get the same result.
Here's the massacre...

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

I cant see much detail. I think I see some small resistors. You must not damage them.
Check the resistance again between one of the outer strips and the center square pad while the CPU is removed.

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

.

[stryed]

Re: Toshiba Satellite - Locks up when plugged in

Ok..will do that tomorrow. I didn't scratch the tiny resistors but might have used a desolder braid to remove a little smudge around one several times (are they easily damaged by heat? I didn't scratch them)

Did I damage anything below the black line? I did scratch the copper pretty deep.
Also, is the copper I've reached underneath, from the + or - side? I'm confused...
Is the continuity simply caused by some leftover solder somewhere in and around the ravin I've dug? (It's hard to get rid of all the solder inside and around...)


I'm a total noobie and don't really picture PCBs in their 3D, layered form. 2D is new already.

Thanks for the reply, will remove the proc asap.
Sorry for the picture quality.

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

Ok..will do that tomorrow. I didn't scratch the tiny resistors but might have used a desolder braid to remove a little smudge around one several times (are they easily damaged by heat? I didn't scratch them)

Did I damage anything below the black line? I did scratch the copper pretty deep.
Also, is the copper I've reached underneath, from the + or - side? I'm confused...
Is the continuity simply caused by some leftover solder somewhere in and around the ravin I've dug? (It's hard to get rid of all the solder inside and around...)


I'm a total noobie and don't really picture PCBs in their 3D, layered form. 2D is new already.

Thanks for the reply, will remove the proc asap.
Sorry for the picture quality.

A better photo is needed for useful detail to be seen.
You need to avoid bumping the resistors. They can be easily knocked of the PCB or worse, the PCB might be damaged.
The photo in post 225 shows the polarity of the pads under the original capacitor.

[Mad_Professor]

Re: Toshiba Satellite - Locks up when plugged in

Well it fixed this laptop, although those panny 330 were a bit big, I kind of wonder if they came in smaller packages?

I did not do a very good solder job this time, although caps are on solid.

I don't know what I could have done better, since it was a fight for space and ensuring the pads line up.

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

I recently switched to SMD tantalums. I place them straight across rather than angled. Two small areas of lacquer need to be scraped for the (-) solder joints.
Ill take a photo next time
I use these http://www.aliexpress.com/item/Free-...699744043.html

[jeremykum]

Re: Toshiba Satellite - Locks up when plugged in

On the safe side, I always use 6pcs tantalums (Panasonic Ultra Low ESR 2.5v,330uF), proven to last more than a year. This isn't a Toshiba board though, but same goes, 6pcs.
Acer Board in picture.

[dj_ricoh]

Re: Toshiba Satellite - Locks up when plugged in

On the safe side, I always use 6pcs tantalums (Panasonic Ultra Low ESR 2.5v,330uF), proven to last more than a year. This isn't a Toshiba board though, but same goes, 6pcs.
Acer Board in picture.

nice work!!
uber clean!
did you use IR or hot air?

[spleenharvester]

Re: Toshiba Satellite - Locks up when plugged in

As above, neat job!

[rievax_60]

Re: Toshiba Satellite - Locks up when plugged in

nice work!!
uber clean!
did you use IR or hot air?

I am more than slightly curious also.

[stryed]

Re: Toshiba Satellite - Locks up when plugged in

I cant see much detail. I think I see some small resistors. You must not damage them.
Check the resistance again between one of the outer strips and the center square pad while the CPU is removed.

I'm getting 0.6ohms without the cpu again. So with ot without cpu, with or without caps, I always get the same reading and a bridge between pos and neg.