Question about Sony VAIO PCG-K35 Notebook

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URGENT! My computer doesn't switch on and Ihave a tight schedule.

I was working with a USB external disk.When I plug the external disk AC/DC power supply, my laptop switch off and I am unable to turn it on again. I have a machine from a client, he says "he tried to replace his memory to upgrade it", I suspect he failed to remove ALL power meaning AC and battery prior to doing so. I am sure the machine was otherwise off. With AC plugged in, battery indicator shows charging. When you press the power switch, the green light briefly comes on and goes out, no fan, no text on screen, no start-up, no hard drive power, no BIOS display, totally DEAD. Subsequently pressing the power switch - the green light is on less time than the first time after the initial power on attempt, comees on, goes out, sits quiet, like battery is dead. I do not feel it is a fuse issue because the charging light comes on and green light blinks on and then off. Ideas? CMOS reset? I have computer repair skills, but not sure if this one is beyond repair. Thank you, Steven

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  • ultimitloozr May 11, 2010

    What kind of response do you get when you remove all SODIMM modules and try to start the computer?

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  • 39 Answers

Please try a different ac-adapter, since its most likely defective.

if the powerled just blinks 1 time it usually indicates that the battery is empty and need to be charged.

Posted on May 30, 2009

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WD500H1U-00 Western Digital 500GB MY BOOK external hard drive does not turn on power. There are two cables, one goes from external hard drive to computer and then another one is a power cable. It does not...


Believe it or not, unplug the AC adapter (Power Adapter) from the surge protector, and plug it directly into the wall socket.
Try this first.

1) I believe the power adapter is rated at 12 Volts DC, and 2 Amps, for the output voltage, and amperage.
(12 Volts times 2 Amps = 24 Watts.
12V X 2A = 24W)

Use a multimeter, and test the voltage coming out.
You can buy an economical multimeter for around $8 to $12. A lot of stores carry them. An auto parts store is but one place.

The plug end that plugs into the laptop, is cylindrical in shape, and has a hole in the center.

This is DC voltage you are testing.
The metal center of the plug is Positive. The outside shield surrounding the plug is Negative.

The Function Knob should be turned to DC Voltage.
(If it is a symbol, it will be a dotted line above a solid line.
NOT a curved line on a dotted line. This is for AC voltage)

If there is more than one scale, set the Function Knob to DC voltage 0-50 Volts.

The Red probe lead of the multimeter is the Positive lead.
The Black probe lead of the multimeter is the Negative lead.

AC adapter plugged into power, the Positive probe lead is inserted into the center of the plug.
Be SURE it doesn't touch the outside metal shell at any time.

The Negative probe lead is touched to the outside metal shell.

See if the voltage reads 12 Volts.

AC adapter (Power Adapter) checks out OK?
Suggest there is a problem with the small circuit board inside the MyBook.

Inside the MyBook WD500H1U-00 is an ordinary harddrive.
It is a desktop sized harddrive. 3.5 inches across in width.
(3 and a half inches, or 8.9cm)

It is a SATA harddrive.

http://www.youtube.com/watch?v=6FlySnyJ0CQ

Inside that plastic MyBook case is also a small circuit board. An interface circuit board.

The harddrive plugs into the interface circuit board directly, or there is a cable, or cables, that plug into the harddrive from the interface circuit board.

It is this interface circuit board that goes bad most of the time.

You can remove the harddrive out of the MyBook case, and put it inside a desktop computer that uses SATA harddrives, as a Slave drive.
Retrieve your information, and burn to disk/s, or flash drive/s.

{DO NOT move any jumpers on the back of a SATA harddrive. These are for the factory ONLY}

Or you can buy an adapter that the harddrive plugs into, and it has a USB cable.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2583340&CatId=3770

Or you can put it into a 3.5 SATA external enclosure, and use it as an external harddrive again.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2145406&CatId=2780


For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 03, 2011 | Computers & Internet

1 Answer

I have the Western Digital My Book Essential Edition 250GB External Hard Drive. I have moved and lost the power cord. I purchased the DYNEX 500ma Universal AC Adapter as a replacement. When I plug the...


I don't have a photo of the AC adapter, but if you look on it the Voltage and Amperage specifications are;

Input: 100-240VAC / 50~60Hz
Output: 12VDC / 2A

This means the Input power can be from 100 volts to 240 Volts AC, and at 50 to 60 Hertz

The Output power is 12 Volts DC at no more than 2 Amp's. (Amperes)

Asian Power Devices Inc. has a model DA-24B12 that fits these specs.
Also a Wattac AC adapter model number - BAO362Zl-8-A01 will work.

Otherwise just use a 12 Volt, 2 Amp power pack, with a positive on center contact, and a 2mm pin hole

Sep 15, 2011 | Western Digital 250GB MyBook External USB...

1 Answer

I have simpletech 1.0TB external hard drive 96300-41001-135 that i bought from the US. I am trying to find a DC plug for it but i dont know which one i should get that don't damage my hard drive. ...


http://www.zlectronic.com/product/3727.html
Item Condition : 100% Brand New
DC Output ( V /A ) :12V 2A
Output Power(W) :24W
AC Input : 100 AC - 240 AC (50/60HZ)

Protection : Short and Overload Circuit Protection
Adapter Performance : High in Quality and Stability
Warranty Guarantee Period : 120 Days Warranty

Compatible Model :SIMPLETECH 96300-40001-001 Storage

Package Content :

- One Power Adapter
- One AC Power Cord fit your country

Nov 27, 2010 | SimpleTech SimpleDrive Portable USB 2.0...

1 Answer

I have several computers at home, and none og them can recognize this portable device. Hitachi 250 GB Mod: SDM/250RW


1) Power:

It may be the problem that occurs with a lot of USB powered devices jrherrer. Not enough power provided.

The USB cable plugged into the computer, provides signal wires for transferring information back, and forth, and also provides 5 Volts DC for power. (Two D cell flashlight batteries produce 3 Volts DC)

http://en.wikipedia.org/wiki/USB

[ Below shows the Signal pins, and the Voltage pins of the USB B Mini style connector, (Male), used to connect to the SimpleDrive Mini external harddrive,

Pin 1 is for the 5 Volts DC Positive (Wire color - Red)
Pin 2 is for the D- Signal (Wire color - White)
Pin 3 is for the D+ Signal (Wire color - Green)
Pin 4 is not connected. (Or sometimes joined to Pin 5 with a Resistor)
Pin 5 is for the Ground (Wire color - Black)

Just added info in case you wanted to know ]

From what I see the SDM/250RW has a USB port on the side, and a DC Power Jack, used for an AC adapter, also.
(Round port with a pin in the center)

http://www.hitachigst.com/tech/techlib.nsf/techdocs/0C876B7AB91B23988825773F006BEA02/$file/SD_Mini_DS_final.pdf


From what I see stated from Hitachi, and sellers on the 'net, the AC adapter may not be provided.
Many of those who provide a review state that both the USB cable, and the AC adapter is needed to provide enough power. Seems to be a power hungry external harddrive

It's a 2.5 Hitachi SATA laptop harddrive inside that external case. (The Harddrive is 2 and a half inches across in Width. Common size used for laptops)

When using an external device powered by a USB cable there are general guidelines to follow,
A) The USB cable should not be more than 2 feet in length
B) Connect the device directly to your computer, instead of through a hub, or other device, unless the USB hub has it's own power.


2) USB cable:

Could be a faulty USB cable, although I imagine you have tried different ones by now.


3) Interface Circuit Board:

The Hitachi SATA 2.5 harddrive inside the SImpleDrive Mini SDM/250RW, plugs into a small circuit board located inside that external case.

Components on the circuit board may be fried, or the Harddrive may have come loose from the interface.

Loose from the interface
To explain;
The back of the harddrive has connector pins sticking out.
The interface has socket holes which the pins insert into.

Faulty circuit board
The external case of the SimpleDrive Mini SDM/250RW can be carefully opened up, and the Hitachi SATA 2.5 harddrive extracted out.

Another inexpensive external case for a 2.5 SATA harddrive can be procured, and the Hitachi harddrive put in it.

Example of a 2.5 SATA external enclosure,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3743049&CatId=2781

Nov 22, 2010 | Hitachi SimpleDrive Mini 250GB USB 20...

1 Answer

Dear Sir/ Madam, I have TWO Western Digital USB


first of all , you are looking at the wrong voltages. The important voltage is the DC OUTPUT, which is the voltage the external harddrives use AND the polarity of the plug attached to the harddrive end of the cable.
if both the harddrives have say 12v dc output and both have the insignia of the center conductor being + (posative) then you can interchange them. and you CAN run a 9volt unit with 12volt DC power, but not the other way around.
Look at your power adaptors again for the OUTPUT and polarity.
should be a half-circle with lines depicting the polarity(+,-) of the center and sheild connections to the hard drives printed on both the harddrives and the power adaptors . This can also be tested with a dc volt meter while the adaptors are plugged into the wall.
DO NOT try to test the AC end while plugged in!!
Regards

Aug 09, 2010 | Western Digital 250GB MyBook External USB...

2 Answers

Screen will not work


  1. Connect the AC adapter into a known working AC outlet and to the DC jack on the notebook. NOTES:
    • Verify the correct Sony AC adapter is being used, and not a third-party replacement AC adapter. To determine the model number of the AC adapter for your computer, refer to the specifications available online through the Manuals/Specs/Warranty link on this page.
    • Do not connect the AC adapter to a surge protector or extension cord.
    • If the DC jack on the computer is loose or damaged, the computer may require service.
    • Some AC adapters have a POWER LED indicator and can be confirmed as receiving power by ensuring the LED is lit. If the AC adapter is damaged, or the LED is not lit or continuously flickers when plugged into a working AC outlet, the adapter must be replaced. A replacement AC adapter can be obtained from the Sony® Parts and Accessories Sales Web site at http://www.sony.com/pas or by calling (239) 768-7691.
  2. Attempt to turn on the computer normally.
  3. Press and hold the Power Switch for 5 seconds.
  4. Remove the battery.
  5. Disconnect the AC power adapter.
  6. Press and hold the Power Switch for 5 seconds.
  7. Connect the AC power adapter.
  8. Attempt to turn on the computer. NOTE: If the computer turns on without the battery, connect and charge the battery for 24 hours.
  9. Disconnect all external devices that are connected to the computer. NOTES:
    • These devices include, but are not limited to, a modem, floppy disk drive, network connection, USB device, printer, keyboard, or mouse.
    • On older model computers, the maximum current output from the USB is 500ma. If a connected USB device draws more current than this amount, the unit may not power on.
  10. Attempt to turn on the computer.
  11. Remove any additional Random Access Memory (RAM) that was installed in the computer.
  12. Attempt to turn on the computer. NOTES:
    • The troubleshooting steps listed above should resolve your issue. If you have completed all of the steps and the issue is not resolved, service may be required.
    • When shipping the computer for repair, include all notes of the LED status that display during troubleshooting.
[[DAPC Direct Accessories and Parts Center]] If all the above troubleshooting steps fails, then you will have to ship the Computer to San Diego Service Center.

Jul 04, 2010 | Sony VAIO VGN-CR220E/P Notebook

2 Answers

URGENT! My computer doesn't switch on and Ihave a tight schedule.


PUSH And hold in your power switch for 15-30 seconds

Apr 08, 2009 | Computers & Internet

1 Answer

My computor switches off the moment i plug in the wd passport.


Probably a power issue. Your new computer has less extra power capacity and the external drive is pulling from the USB port power.

What you need is a USB hub with an AC adapter that powers the hub and any devices that are connected to it from the external AC power adapter and NOT from the USB bus. In other words look for an external power adapter that plugs into the wall as well as into the USB port. Don't get a recharger for an iPOD as that will not do you any good. And don't get a hub that says "powered" or "external power" that does not have an AC power adapter because it is still sucking power off of the USB port.

Try shopping for a D-Link DUB-H4 High Speed USB 2.0 4-Port Hub. It is a good choice if you are not going to plug any USB 1.1 devices into it. Read the reviews for any device you choose.

Oct 26, 2008 | Western Digital Passport WDXML800UE...

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