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Tuomo

Senior Member

Last Activity: 05-28-2023, 12:24 PM

Joined: 01-06-2013

Location: Sievi

Tuomo replied to Toshiba C850 only wants AC power

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-23-2013, 05:59 AM
Re: Toshiba C850 only wants AC power

Keyboard controller is bit misleading name to this chip

Those 3.3V voltages from Battery connetor go to KBC chip etc...

If FDMC884 replacing not help, you can check what is your motherboard manufacturer ( quanta? ).

Same manufaturer has very similar schematic even componet name are different....

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Tuomo replied to Hp dv6700

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-22-2013, 08:12 AM
Re: Hp dv6700

Thank you. Unfortunately I can not find this model schematics....

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Tuomo replied to Toshiba C850 only wants AC power

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-22-2013, 06:20 AM
Re: Toshiba C850 only wants AC power

a few things that could explain the problem at Battery present no boot.

1. AC Voltage go directly to Battery.

2. Keyboard controller is broken.

3. Something else?...

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Tuomo replied to Hp dv6700

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-22-2013, 05:56 AM
Re: Hp dv6700

Yes, PQ61 is MosFet on DV6700 intel motherboard.

You have other model and there is different names.

What is your motherboard type and is it Intel or Amd?...

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Tuomo replied to Hp dv6700

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-21-2013, 11:54 AM
Re: Hp dv6700

Do we have same shematics DV 6700 Intel_quanta_at3?

I quess I have different schematics. Can you post your schematic?

PQ61 should be near AC Input and it should be 8 Pin Mosfet....

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Last edited by Tuomo; 05-21-2013, 11:56 AM.
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Tuomo replied to Hp dv6700

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-21-2013, 08:05 AM
Re: Hp dv6700

I think you should start measuring PQ61 voltages....

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Tuomo replied to HP 425 No power

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-21-2013, 07:45 AM
Re: HP 425 No power

First 3VA and 5VA always voltages U519 have to works.

Check those voltages....

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Tuomo replied to Sony vaio VPC-EB mbx223/ no start,no power no led

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-19-2013, 10:17 AM
Re: Sony vaio VPC-EB mbx223/ no start,no power no led

Not yet, first check PR13 and PR14.

Then measure PQ1 voltages....

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Tuomo replied to Sony vaio VPC-EB mbx223/ no start,no power no led

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-19-2013, 07:48 AM
Re: Sony vaio VPC-EB mbx223/ no start,no power no led

Measure PU3 PIN5 ACDET.

This detect if AC Power is inserted.

Measure PU3 PIN4 ACDRV# should be LOW....

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Last edited by Tuomo; 05-19-2013, 07:53 AM.
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Tuomo replied to need acer aspire 1430 schematic diagram.

in Schematic Requests ONLY!

05-18-2013, 02:36 AM
Re: need acer aspire 1430 schematic diagram.

[url]http://elektrotanya.com/?q=showresult[/url]Re: need acer aspire 1430 schematic ...owresult[/url]...

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Tuomo replied to DV6000 not charging,no sign or indication of charging..

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-17-2013, 07:23 AM
Re: DV6000 not charging,no sign or indication of charging..

There is different DV6000, so do you have schematics?...

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Tuomo replied to Toshiba L650 power problem

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-09-2013, 02:02 PM
Re: Toshiba L650 power problem

I would changed U6000.

Thanks excelent measurement....

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Tuomo replied to Toshiba L650 power problem

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-09-2013, 12:56 PM
Re: Toshiba L650 power problem

ACIN PIN19 1.69V indicate at there is AC Adapter inserted.

If ACIN PIN19 > 1.485V then ACOK = 0V.

ACOK PIN10 5.34V means at AC Adapter NOT detected.

If other voltages are OK, then U6000 may be FAILED....

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Tuomo replied to Toshiba L650 power problem

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-09-2013, 09:07 AM
Re: Toshiba L650 power problem

No, just AC Adapter not detected.

Measure PIN 19 ACIN this is pin which detect AC Adapter....

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Tuomo replied to acer aspire 6920g power problem

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-09-2013, 08:51 AM
Re: acer aspire 6920g power problem

This looks ok, so next check 5V and 3V always....

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Tuomo replied to compaq presario CQ45

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-06-2013, 06:18 AM
Re: compaq presario CQ45

Glad to hear it....

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Tuomo replied to Toshiba C850 only wants AC power

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-06-2013, 06:03 AM
Re: Toshiba C850 only wants AC power

Not even 3.3V?...

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Tuomo replied to HP Pavilion DV4 turns off around 6 o 7 seconds.

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-06-2013, 05:59 AM
Re: HP Pavilion DV4 turns off around 6 o 7 seconds.

Just cheked, and there seems to be very good videos.

Put searching world "Laptop chip level repairing"...

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Tuomo replied to compaq presario CQ45

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-05-2013, 05:29 AM
Re: compaq presario CQ45

I think schematic find here [url]http://kythuatphancung.com/search.html[/url]Re: compaq presario CQ45<br /> <br ...rch.html[/url]...

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Tuomo replied to HP Pavilion DV4 turns off around 6 o 7 seconds.

in Troubleshooting Laptops, Tablets, and Mobile Devices

05-05-2013, 03:12 AM
Re: HP Pavilion DV4 turns off around 6 o 7 seconds.

I think you find advice from youtube.

Put black probe to ground and red probe to coil if resistance is low check componet around this area.

There is very low resistance to GPU and CPU so remove CPU before measure resistance....

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