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Up 6735s laptop starts but screen stays black

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4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

kevin_gordon
  • 21 Answers

SOURCE: The hp 6735s laptop wont start up?

At this point it sounds like your version of Windows is corrupt.

Try these steps

  1. Turn on your computer
  2. Count to 3
  3. Hold down the SHIFT or F8 key on your keyboard
  4. From the menu that appears look for the option marked "Safemode" enter the number on your keyboard that is beside safemode and press enter
  5. When windows loads click Start and choose Run
  6. in run type in "sfc /scannow" without quotes and press OK
  7. You may be prompted for your Windows CD. If you are, put your Windows CD or System Recovery Disk in your CD ROM and press okay
  8. This process can take a while. Once its done, reboot...
If the same screen that you described comes up again you may need to reinstall Windows.. This is done by putting your Windows CD or System Recovery CD in the CD ROM drive and rebooting your computer.

Hope this helps! If it doesn't please post back and I'll provide more help

Posted on Aug 17, 2009

Testimonial: "Thank you - Hard Drive knackered - HP sending new one out - cheers for your help!"

  • 57 Answers

SOURCE: my acer 5735 laptop sreen stays black at start up

Hi,

First of all, go to advanced boot options, and see whether last known good configuration works or not

can you boot into safe mode? If so, try to do system restore, if that doesn't work as well, try to do a clean boot, followed by an advanced clean boot and a hardware clean boot.. these steps might help ..

clean boot : http://support.microsoft.com/kb/310353

advanced clean boot : http://support.microsoft.com/kb/316434

hardware clean boot :
Follow the steps below to perform hardware clean boot
1. Right click on My Computer -> Properties
2. Hardware Tab -> Device Manager
3. Right Click on Sound Card, Video Adapter, Network Adapter one by one and click disable
4. Reboot the computer. If the problem is fixed then you can enable the hardware devices one by one to find the exact device that cause the problem

If these steps don't solve the problem, unplug any external devices from your computer and see whether that resolves the problem .

If nothing works, try doing system restore from winre, if that doesn't work as well, you'd have to do that manually,

try these steps,
go to WinRE) open folder C:\Windows\System32\config

and rename these files:

BCD-TEMPLATE ->BCD-TEMPLATE.OLD
DEFAULT->DEFAULT.OLD
SAM ->SAM.OLD
SECURITY ->SECURITY.OLD
SOFTWARE ->SOFTWARE.OLD
SYSTEM ->SYSTEM.OLD

(don't change COMPONENTS file because system don't store any copy of this file,BCD-Template system will reconstruct automatically when you boot into WinRE)

Next navigate to C:\Windows\System32\config\RegBack folder and copy all items to C:\Windows\System32\config

Next boot into WinRE and try again restore system to previous checkpoint.

The last option would be to format your root drive and install the OS again..

Hope that helps, and good luck

Posted on Nov 23, 2009

joecoolvette
  • 5660 Answers

SOURCE: my laptop is hp compaq

1) First check the Display to make sure this isn't the problem.

Laptop on shine a flashlight at the LCD screen, and various angles.
Do you see faint images?

Do you have a VGA monitor available? (Also referred to as a CRT. Resembles a small TV)
If so, laptop off plug the VGA monitor into the VGA connector on the Left side of the laptop.
(Typical VGA connector,

http://en.wikipedia.org/wiki/File:SVGA_port.jpg )

Turn the VGA monitor on, and let it power up. Once the VGA monitor is powered up turn the laptop on.
Is there a display on the VGA monitor?

If not press and hold down on the Fn key, then tap the F4 key.
This action should toggle your display over to an external monitor.

Yes? You have a display on the external (VGA) monitor?

Then you have a problem with the Backlight, or the Inverter.

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is used as an additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Typical size is 3 to 5 inches long, and half the diameter of a No.2 pencil.
A Backlight is located within the metal framework holding the LCD layers together, and is on one edge of those layers. {An LCD screen is composed of layers)

An Inverter is used to provide power from the laptop for the LCD screen, and the Backlight.
90 percent of the time the problem is the Inverter.

An Inverter is a small circuit board located within the Display Assembly. Behind the Bezel of the Display Assembly, and located usually at the bottom of the LCD screen.
(The Bezel is the thin plastic frame that surrounds the LCD screen in the front)

Typical example of an Inverter for an HP Compaq 6735S,

http://www.impactcomputers.com/494116-001.html


The Display Assembly needs to be removed from the laptop, in order to remove the Bezel, and gain access to the Inverter.
Pictorial guide of how to remove the Display Assembly,

http://www.insidemylaptop.com/disassemble-hp-compaq-6730s-6735s-notebook-remove-cooling-fan/

Follow Steps 1 through 7.

This pictorial guide shows how to remove the Bezel. The guide is for replacing a webcam module.
Disregard removing the webcam module, and follow the other steps.

http://www.insidemylaptop.com/replace-web-camera-in-hp-compaq-6730s-6735s-notebook/



2) If NO display is shown on the external monitor you have a graphic chipset problem.
This requires replacement of the motherboard.

Chip and Chipset are slang terms to mean I.C.
Integrated Circuit.

The graphics chip is mounted to the motherboard with a BGA surface mount. (Ball Grid Array)
Having the chip removed and replaced is more expensive than replacing the motherboard.

This is the download page for the Service Manual (Free) from HP Support,

http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=101&prodTypeId=321957&prodSeriesId=3687621#3

Under the heading > Service and maintenance information, click on the file name,

HP Compaq 6730S and 6735S Notebook PC - Maintenance and Service Guide.

This is a PDF file.
Usually takes 2 to 5 seconds to see the first page come up, and additional time for the file to fully download.
Suggest you let the file download all the way before looking through it.

Regards,
joecoolvette

Posted on Dec 04, 2010

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When you say you move him, do you mean lifting the unit and moving to another location or just moving the lid (changing angle of the lid/lcd)?

If changing the angle of the display gives you black/white screen, you may be having problem with the LCD cable, it might be loose or defective. But if moving the unit to another location gives you the black/white screen, one component of the unit might be loose. Either you need to properly reinsert the memory of the harddrive. If these simple steps will not resolve the issue then you might need to check the whole motherboard including the connection to the LCD.

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If there is a display switch in the functions on the keyboard (most likely will look like a laptop monitor or a computer monitor on the keyboard). Press the function key and the button associated with that and wait 3 to 4 seconds (you may have to press it multiple times) If you have anything in the vga slot, then it may think a monitor is plugged in and won't display the laptop screen.
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Have you tried another power cord? If you try another power cord, and it still does the same thing, then I think your laptop is having a power problem. You need to take is to a technician to fix the problem for you.

Best wishes.

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If you use it from the power cable does it work better? There is a known issue with the 6735s and power management settings from battery.

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