when the laptop came to me, it was locking at win7 installation with psycedelic! screen, i reballed the i960 north bridge/gpu but it didnt work. Then i ordered a new chip and arrived yesterday. after a succesfull soldering, it worked great. i installed win7 without any problem. But then it started to restart every 6-7 minutes, i run into bios setup and change the values about cpu auto voltage or something like that to low,/save restart and its not ressetting now, but it hangs up with corrupt screen graphics showing desktop in drunk mode! (:P) the machine is toshiba a200 or 205 dont remember now today it was really busy, and also it has the cap NEC/TOKIN 0E907. any suggestions ?
-
Last edited by spidey; 01-28-2013, 01:08 PM. -
Re: is it a faulty nec/tocin ?
IMO, the NEC/TOKIN caps were responsible for issues like 'Not powering on when charger plugged in' and stuff like that. Hanging up on with corrupt screen graphics is some issue that can be related with ram related. Try swapping your ram. -
Re: is it a faulty nec/tocin ?
Or look closer to VRAM chips. Sometimes needs reflowing...Laptops and computers repair.Comment
-
Re: is it a faulty nec/tocin ?
Incorrect.IMO, the NEC/TOKIN caps were responsible for issues like 'Not powering on when charger plugged in' and stuff like that. Hanging up on with corrupt screen graphics is some issue that can be related with ram related. Try swapping your ram.
The Nec/Tokin chips are filtering capacitors for the CPU VRM. They rapidly lose their capacitance over a short time and will cause the instability you are experiencing.
Get four or five of these:
http://cgi.ebay.com/261152785753
Search this forum for the Nec/Tokin thread so you can see an example of how to solder them in. It should solve your problem.Comment
-
Re: is it a faulty nec/tocin ?
i'll dot it today.Comment
-
Comment
-
Re: is it a faulty nec/tocin ?
fixed .Comment
-
Re: is it a faulty nec/tocin ?
first i tried with 16 caps, from another mobo's from the same place under the cpu socket. but it didnt work. then i desoldered 2 ea 330 , and 2 ea 33(i didnt check from smd book but i think there're same) caps. and it works great now.
i attached the pics i took. hope it helps.Attached FilesComment
-
-
Re: is it a faulty nec/tocin ?
thanksComment
-
Re: is it a faulty nec/tocin ?
wrong place
sorryComment
-
Re: is it a faulty nec/tocin ?
Spidey why did you place 2x 330 and 2x33 ?
the lowest values for tokin is 900.Just cook it! It's already broken.Comment
-
-
Re: is it a faulty nec/tocin ?
Can you take a picture of the capacitor you use please. TY!
I'm really desperate, I can't find 330uf Tantalum SMD Capacitor 2.5v in our area for my Toshiba Satellite L300-1A3 System Unit.
Please help me look for the right Caps at http://philippines.rs-online.com
I'm from Philippines, I've been looking all over our city but failed to acquire it. Maybe some kind hearted Pinoy out here can extend assistance in purchasing. Can I ask for your extra 330uf Tantalum SMD Capacitor 2.5v or we can arrange a trade. You can send me the Caps and I'll send you the payment. I need 6-8 pieces of this capacitor.
All help is appreciated, TIA!Last edited by teknub; 03-23-2013, 03:04 PM.Comment
-
Re: is it a faulty nec/tocin ?
And the adapter may be too low of rating if it crashes with a corrupted screen.ASRock B550 PG Velocita
Ryzen 9 "Vermeer" 5900X
32 GB G.Skill RipJaws V F4-3200C16D-32GVR
Arc A770 16 GB
eVGA Supernova G3 750W
Western Digital Black SN850 1TB NVMe SSD
Alienware AW3423DWF OLED
"¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mà mismo
"There's nothing more unattractive than a chick smoking a cigarette" -Topcat
"Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat
"did I see a chair fly? I think I did! Time for popcorn!" -ratdude747Comment
-
Re: is it a faulty nec/tocin ?
Today i met an acer 4736z (mother board is Compal la-4494p) with nec tokin capacitor. At the first it could trigger and run normal with adaptor. Insert the battery without adaptor it could trigger too but didn't run.
Checked all voltages it lost Vcore in this case. Thought it could be the nec tokin capacitor bad, so replaced this capacitor with four 330 other capacitors then inserted the battery it triggered and booted normal.
So i think when nec tokin is bad it only couldn't run normal with adaptor but also with battery
Sorry for my bad english
Last edited by vvacl; 03-25-2013, 08:21 AM.Comment
-
Re: is it a faulty nec/tocin ?
it depends because when you put 4 x 330uf with different voltage rating it works momentarily for a couple of hours then will restart/auto-shutoff due to over heating when the ESR can increase enough to cause circuit malfunction and even component damage thus temperature rises.
Sometimes it is best to put low capacitance value first and observe the cpu if it gets hot as soon as you boot up for a couple of minutes.Comment
-
Hi guys, can someone help me?
I have an issue with laptop dell latitude e5490 that auto restart when arrive at certain point in loading windows.
Board model is dm70 la-f401p rev:1.0 2017-09-20.
At first, the issue is sometime ssd sata 2.5 not detected. i already try another cable, at certain point, it ok using old cable (i mean sata cable here).
After a few days test, is seems ok.
Days later, another issue come, that is auto restart when certain point in loading windows. i already test another ssd, another ram, another sata ribbon, still same.... -
Well I think that I have a GTX660Ti that's dead but I think I should give it one last try with its original OS and drivers: win7 home premium. While I can't stomach using win* of any type (I'm 100% Linux these days) I think I have to give benefit of the doubt to drivers, etc.
So... I have the original CoA for Win7 home premium and it's an OEM license. And I have the whole computer that the GTX660Ti came in (it was reportedly working too), minus the original hard drive, what could I download and run the machine temporarily to verify the GTX660Ti works with Windows or not?
... -
Hello esteemed members. I appreciate that my question will strike some as being somewhat childishly simple, but it genuine perplexes me! I have repaired several laptops before by removing a faulty capacitor that was short-circuiting the motherboard, whereupon the laptop would then work. For me, it begs the question that, if the current can bypass where the capcitor was when it has been removed, why didn't it just bypass it when it was present and faulty,? I can't get my head round the premise that if the other side of the capacitor is connected to ground, then why doesn't the current simply bypass... -
Hello. I have a Samsung qled model QE58Q60TAU.
The TV restarts continuously and without an image. If I disconnect either half, the TV does not restart, but in both situations I have absolutely nothing on the display, only the backlight is on. I checked the CKv signals and the rest VGH, VSS etc. I measured them against the ground and between them and found between VGH and VSS a resistance of 106 ohms on the B side of the screen (right). I isolated all the signals on the right side and covered them with scotch tape and absolutely nothing has changed, it doesn't restart but I have no picture... -
hello everyone. please help i have a surface laptop 3 AMD model 1873 that randomly restart. i don't think it has bad CPU, because when tried to stress test by CPU-z it not restart or has anything wrong, it just randomly restart when normal use ( browser, or watch video....). i tried to replace U6701 and U6702 but don't see any thing change.
I'm tried to fine any glue on internet but no luck. I'm looking for any advice from you guy please....
Comment