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Napalm started a topic Microsoft Surface pro 5 - not powering on

in Troubleshooting Laptops, Tablets, and Mobile Devices

09-13-2024, 03:14 PM
Microsoft Surface pro 5 - not powering on

I have this surface pro 5 that is not powering on, but it charges the battery, power connector lights up and battery is charged. power button has 3,3.
These coils are shorted to ground. It's the +3P3VSB and +1VSB.
There is 15v, 10v, 8.8v, 3.3v present on the board.
Tried to inject voltage in those coils: 1v 3a but could not find the short because lots of areas heat a little.. and I don't have thermal camera..

Any ideas?
Thanks.

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

07-16-2017, 11:54 AM
Re: Toshiba Satellite - Locks up when plugged in

Yes you can use it. Many people here in this thread did that.

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Napalm replied to C850D beep no ram but no boot no image

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-10-2017, 03:47 PM
Re: C850D beep no ram but no boot no image

I was able to boot fine in uefi mode again, but seems to have same problem, video chip bad, gives bsod randomly about video driver...

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Napalm replied to C850D beep no ram but no boot no image

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-09-2017, 01:57 PM
Re: C850D beep no ram but no boot no image

Did You have solve the problem? I'm having the same symptoms with same model...

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-22-2016, 11:58 AM
Re: Toshiba Satellite - Locks up when plugged in

Maybe you need more capacitors

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-17-2016, 06:16 AM
Re: Toshiba Satellite - Locks up when plugged in

Another successful repair, using caps from old scrap boards....

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Napalm replied to toshiba A200 la3481p

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-16-2016, 10:56 AM
Re: toshiba A200 la3481p

I have a similar problem on my A200.
With battery installed and ac plug:
- no leds light
- no action if press power
- no charge
- nothing
- same behavior without battery

with battery only:
- If I press power it powers on. leds light up.
- after powered on I can plug AC adapter and works fine, charges battery etc.
- If I power off from windows, the led for ac plug and battery charge still work
- If I pull ac plug off and on it no longer works.

Anyone knows where in the board...

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

06-18-2014, 03:25 PM
Re: Toshiba Satellite - Locks up when plugged in

Hello
I have accidently removed a litle capacitor numbered C142 when removing a bad nec tokin. (see image)

i tried to resolder it but its very difficult.
With 4 tantalum caps it did not boot, with 6 it boots fine but powers down loading windows.
any way to fix it?
the problem now is that it disappeared and I dont know where it is. I have scrap boards the problem is know the specs of the tiny smd......

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-18-2014, 03:04 PM
Re: Toshiba Satellite - Locks up when plugged in

It worked with just an aditional cap from an broken board.
I've scraped the pcb so all could fit, here it is the ugly soldering i did, but it's working fine.
thanks all....

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

01-16-2014, 04:04 PM
Re: Toshiba Satellite - Locks up when plugged in

Hello.
For the 3rd time I have a toshiba laptop with the symptoms required for a capacitor OE128 replace.
So that's what I did, I replaced it with 4x Tantalum Capacitor 330uf 2.5v SMD LOW ESR .
Previous times I had success.
This time It did not correct the problem... If I boot with only the battery and then I plug the power, after 2 seconds the laptop shuts down and reboots.
If I boot with the power connected sometimes I get into desktop and then it freezes or reboots.
Some times when it freezes...

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Napalm replied to Samsung LE32A336 bad PSU (maybe)

in Troubleshooting TVs and Video Sources

01-10-2014, 12:39 PM
Re: Samsung LE32A336 bad PSU (maybe)

Ok I tested it before without the back on.
Now I put the back, and it is working so far for 2 hours...

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Napalm replied to Samsung LE32A336 bad PSU (maybe)

in Troubleshooting TVs and Video Sources

01-10-2014, 08:39 AM
Re: Samsung LE32A336 bad PSU (maybe)

Yes it rebooted endlessly.

I called a friend and he identified what must be the problem: dry joints

When the tv heats the solder no longer makes good connection and goes out.

here are some pictures. tested the tv for 4,5 hours and still on......

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Napalm replied to Samsung LE32A336 bad PSU (maybe)

in Troubleshooting TVs and Video Sources

01-07-2014, 08:22 AM
Re: Samsung LE32A336 bad PSU (maybe)

Hello.
I have one of this lcd that shuts down after about an hour working fine. after shutdown it tries to power on again, show's picture for about a second then off again repeatedly.

I open it up, capacitors look fine to me.
The psu model is BN44-00252A

What can I do to repair this?

thanks.

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-19-2013, 01:32 PM
Re: Toshiba Satellite - Locks up when plugged in

Success.
I ordered 4 330uf from here: [url]http://www.mobofix.info/loja/product.php?id_product=262[/url]
It was a little hard to solder this, but now the board posts.
Then I tried booting to windows and worked fine from the charger only, but then started making a buzzing noise.
Is it normal?Re: Toshiba Satellite - Locks up whe...o solder this,

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-16-2013, 09:08 AM
Re: Toshiba Satellite - Locks up when plugged in

Could I try them anyway? will it do any harm?

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-15-2013, 12:16 PM
Re: Toshiba Satellite - Locks up when plugged in

I've been reading lots of pages but not all of them, sorry.

I can't find the datasheets of those capacitors because I don't know the brand of them. They are from a hp amd mobile x2 board...

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Napalm replied to Toshiba Satellite - Locks up when plugged in

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-14-2013, 09:40 PM
Re: Toshiba Satellite - Locks up when plugged in

Hello.
I'm also having the issue you're discussing here in a toshiba L300.
Mine had a OE907 so I look on the web I bought one right away for 10 EUR that arrived next day.
It was a bit difficult to remove the old one and solder the new but I managed to do it and reassemble everything.
but now the board does not boot. I press power led lights up but no image on screen.
I wonder If I ruin the capacitor while trying to solder it, so I put the old one back and it is the same does not boot, no display....

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Napalm replied to is it a faulty nec/tocin ?

in Troubleshooting Laptops, Tablets, and Mobile Devices

03-14-2013, 09:38 PM
Re: is it a faulty nec/tocin ?

wrong place
sorry

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Last edited by Napalm; 03-14-2013, 09:40 PM. Reason: wrong post
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Napalm replied to New Members - please post your introductions here

in Announcements & Related News

03-14-2013, 08:23 PM
Re: New Members - please post your introductions here

Helly all
I'm from Portugal and I repair computers.
I hope to learn something here and to teach as well.

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Microsoft Surface pro 5 - not powering on

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