Question about Toshiba Satellite A135-S2276 Notebook

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ASROCK i865 chipset mother board problem

Hi,

after switching on my pc, i can see keyboard lights lit once and gone. But there is no display on monitor and i have checked with other working monitors also, n confirmed there is no problem with the monitor.

Processor fan is also working.. I donnow what has gone wrong,
could you please help me..

Thanks in advance,
Basav

mail me @ basavaraj1985@gmail.com

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  • 1 more comment 
  • basav1985 Jun 23, 2008

    Hi,



    thanks for the reply..

    What I meant was about monitor was, there is no problem with the monitor. The monitor is in working condition, verified it by connecting to other machines.

    And when I started the machine, I couldnt hear any beeps, and there is no display on the monitor at all.. But only I can see that, the numlock,caps lock.. lights are lit once and gone..



    Thanks,

    Basav

  • Ryan Rogers
    Ryan Rogers May 11, 2010

    I need you to be more clear on what you mean when you say you checked the monitor. How did you check the monitor? Did you plug your machine into an external monitor? Also tell me what came up on the monitor when you tested it, ie... desktop, error codes, or nothing.

  • Simon Vann
    Simon Vann May 11, 2010

    Hello Basav,



    Maybe you colud tell me when you power up the machine, if it makes any beeps.



    Simon

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  • 2,028 Answers

This could be a memory chip. Try that, if you don't have any luck, then chances are your problem is with the motherboard. Take it to a shop to have it diagnosed.

Posted on Jun 24, 2008

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Vertical lines on my compaq cq61


Problem is;

1) Bad graphics chipset,
or
2) Bad Video Cable, or loose connections,
or,
3) Bad screen Inverter,
or,
4) Bad LCD screen.

A) Graphics chipset:

(Chip and Chipset are slang terms for I.C.
Integrated Circuit,

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

The chipset, or I.C. used for graphics; is the graphics chipset.
More properly known as the G.P.U.
Graphics Processing Unit,

http://en.wikipedia.org/wiki/GPU )

Laptop OFF, monitor OFF, connect a VGA monitor; to the VGA connector on the laptop. (Port)
(Left side of laptop, if memory serves)

This is a General example of a VGA connector, (Port), and VGA cable,

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

You can use a CRT type of monitor (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.
By factory default settings, the display should show on the external VGA monitor.
IF not;

You have at least 3 display options available;
1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold the Fn key down, and at the SAME time tap once on the F4 key.
(The F4 key is the Display Toggle-Over key)

Still no?
Hold the Fn key down again, and tap once more on the F4 key.

Same display on external VGA monitor (Red lines), suggests problem with the graphics chipset.
Good display on external VGA monitor means;

Problem with;
1) Video Cable
2) screen Inverter
3) LCD screen

http://tim.id.au/laptops/hp/hp%20g60%20compaq%20presario%20cq60.pdf

If you find it is one of the three stated above, post back in a Comment; and I'll guide you step by step, in diagnosing.

Will require partial disassembly of laptop, but not very far.
Will also require an ESD wrist strap.
Average cost is around $3 to $6.

Example,

http://www.radioshack.com/product/index.jsp?productId=2103245

Needed to keep from Static shocking, the delicate hardware components inside the laptop.

[All power removed;
Loosen Keyboard, and roll over out of the way. Do NOT disconnect Keyboard Cable.
Remove Keyboard Cover.
Remove Display Bezel.
Remove screws that hold LCD screen to Display Cover, and check Video Cable connections to back of LCD screen.

The plastic frame in front of the LCD screen, is the Display Bezel.
Laptop closed the top cover is the Display Cover.

Just basic instructions. Like I said, I will step by step you through it, if you wish ]

[Primer:
An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL (or more than one), or a series of LED's.
(Light Emitting Diode)

The Compaq Presario CQ61 series of Notebook PC's, uses a single (1) CCFL.

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses; but on a MUCH smaller scale.

Average thickness is 2mm. That is a little more than 1/16th of an Inch, or about the width of this capital letter -> O <-

Average length is almost as long, as the LCD screen is in height.
View the last 8 photos,

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

The screen Inverter converts the power (Electricity), from the laptop; for the LCD screen, and Backlight.
Backlighting that uses CCFL, uses a screen Inverter.

Backlighting that uses a series of LED's, May or May Not use a screen Inverter.
It seems when the LED technology first came out, they did.
Later designs do not seem to.

Regards,
joecoolvette

Mar 25, 2013 | Computers & Internet

1 Answer

Keyboard lights up screen stays black....after inserting recovery disk screen still remains black...


Would like you to attach an external monitor for a diagnoses.

A VGA monitor.
Can be a CRT monitor that resembles a small TV, or a flat LCD screen monitor, that has a VGA cable attached,

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

1) Laptop OFF, monitor OFF, attach the VGA cable of the monitor to the laptop's VGA connector.

[For the HP Pavilion dv6000z Notebook PC, the VGA connector is on the Left side at the Rear. Second port from the rear. 15 pins.
3 rows of 5]

2) Turn the monitor on. If a CRT style allow it to warm up.
3) Turn the laptop on.

By default the display should show on the external VGA monitor.

If not, press, and hold down on the FN key,
(Second key from the left, on the Bottom row on the Keyboard),
and tap on the F4 key.
(Top of Keyboard towards the left)

Still no? Hold the Fn key down again, and at the same time tap on the F4 key.

There are 3 display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

IF, the display shows up on the external monitor, and if it is OK, the problem lies in the Display Assembly, and/or the Video Cable.

More on that in a moment.

IF, the display does Not show up on the external monitor, or if it is garbled, the graphics chipset is bad.

HOWEVER, there is a problem with the graphics chipset, for the dv6000 series of HP Pavilion Notebook PC's.
More specifically it isn't actually the graphics chipset itself, but the mounting of the graphics chipset to the motherboard.
More on this in a moment.

External VGA monitor shows a good display;
Video Cable:
The video cable is checked for apparent damage first, and at the same time, see if it's connectors are tightly plugged in.

On one end, the video cable is plugged into the motherboard.

(ALL power removed, AC adapter { Charger} and Battery, the Switch Cover is removed, and the Keyboard, far enough to lay it back out of the way. Keyboard Cable still attached to motherboard. The Display Cable is the one to the Far left, right under the left side of the LCD screen. The cable next to it, to the immediate right, is the Microphone Cable )

The video cable routed from the connection on the motherboard, up under the left Hinge Cover, and into the Display Assembly, where it then attaches to the Back of the LCD screen.

THIS connection must be checked also.

{ Just gave advice similar to this earlier. The asker's problem turned out to be a loose video cable connection, on the back of the LCD screen }

Examine the sheath of the video cable. See if there are signs of damage. If so the tiny wires inside the cable could be damaged.
Apparent damage or not, you may want to remove the video cable, and perform a continuity check with a multimeter. (Ohm's. Check each wire in the cable)

Video Cable connections prove to be tight, video cable continuity check proves video cable is OK, move on to the screen Inverter.

Primer:
An LCD screen cannot produce light. It needs an additional light source.
A Backlight is the additional light source.

A Backlight can be a CCFL, or a series of LED lights.

The Backlight is a CCFL for an HP Pavilion dv6000z Notebook PC.
[It is 2mm Wide, and 334mm Long. Or a little thicker than 1/16th inch Wide, and a little over 13 inches Long ]

A CCFL is a Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

A screen Inverter is used to convert power (Electricity) from the laptop, FOR the Backlight, and LCD screen.

90 PERCENT OF THE TIME the fault is a bad screen Inverter.

Example of a screen Inverter for a Pavilion dv6000z Notebook PC,

http://www.nylaptopparts.com/index.php?main_page=product_info&products_id=560

The thin plastic frame that surrounds the LCD screen, and is in front of the LCD screen, (Resembles a picture frame), is the Display Bezel.
The screen Inverter is located behind the Display Bezel, and at the bottom of the LCD screen area.

http://www.insidemylaptop.com/remove-replace-lcd-screen-inverter-hp-pavilion-dv6000-laptop/

http://www.insidemylaptop.com/take-apart-hp-pavilion-dv6000-laptop/

External VGA monitor does NOT show a good display, it is a graphics chipset mounting issue, more to follow.
Regards,
joecoolvette

Jan 15, 2012 | HP Pavilion dv6000z Notebook

1 Answer

No monitor display and wireless ligths off


the Memory chips / Ram has gone bad
I guess there are two ram chips on the mother board try to take off one ram at a time and turn on the pc
If it does'nt work replace the chips ..
Hope it works
All the best !!!

May 03, 2010 | HP 2133 Notebook

1 Answer

My laptop wont come on it just bleeps 3 times the screen is black but it is lit up on keyboard


the Memory chips / Ram has gone bad
I guess there are two ram chips on the mother board try to take off one ram at a time and turn on the pc
If it does'nt work replace the chips ..
Hope it works
All the best !!!

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2 Answers

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Hi,

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Jamiell

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2 Answers

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1 Answer

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2 Answers

My laptop turns on, but there's nothing on the screen.It's black.


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If you get no video at all on the laptop or the 2nd monitor then it is a problem with your motherboard and you will need to have that replaced. Be sure to test for video on the 2nd monitor with the laptop closed and then opened. Also, make sure you press the function keys on the keyboard to switch displays. It would be no fun to think the mother board was bad when it was really the LCD and you just forgot to enable the external port :)

Good luck!

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2 Answers

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- send your laptop to service center to replace it (if it is underr warranty it's free

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