Laptop cannot bootup

My laptop cannot boot. After powering on, I just hear fan noise without any signal on the black screen. the laptop has two stick of RAM and one harddrive. To rule out the reason, I removed them one by one and then powered on. But I have not found any difference before and after the removal. I did not hear any beep etc except fan noise. The screen is always black without any signal. Any one can give me some suggestion ? Thank you

Another thing that I had not told is that the laptop had been running for long time without shutting down. I do not know if this is a reason and which part is easily damaged.
eemoonAsked:
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helpfinderIT ConsultantCommented:
try to connect your laptop to external display. if you can see picture on external monitor probably your built-in laptop´s display if bad.
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eemoonAuthor Commented:
Thank you for your fast reply. I connect the external display, but it is also black without any signal.
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bas2754Commented:
A few things to note:

1.  There are some laptops that have known defects causing the display chip (primarily older HP DV series with NVIDIA) to burn out.  It is possible this is one of those systems.

2.  Remove the power from the laptop.  Remove the batter from the laptop.  Hold the power button in for 30 seconds.  Put the battery back in the laptop.  Plug the power back in and see if it turns on.  

3.  If step 2 fails repeat except leave the battery out and plug the laptop in to try to boot with just power and no battery.

If steps 2 and 3 fail, then it is quite possible the mainboard has failed.  What is the make and model of your laptop?
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JohnBusiness Consultant (Owner)Commented:
Also, connect a DVD to it, turn off, start up, select the DVD and attempt to boot from DVD.

Does it start?
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BillBondoCommented:
To see if display is bad. Do you see any bios? Boot from a cd. You removed both ram at the same time? With external display you may need to do a Function Key. Try dropping from shoulder height onto floor. That s a joke...
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eemoonAuthor Commented:
@bas2754, step1 and 2 failed. It is toshiba satellite
@John Hurst, it is always black without any signal. I cannot change bios and then cannot boot from DVD
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JohnBusiness Consultant (Owner)Commented:
If both the laptop screen and an external display are black as you say, then the likelihood is the motherboard. In any event, you will need to get a repair shop to fix it.
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BillBondoCommented:
Any network activity? Ping? RDP? caps-numbers lock? Remove both ram.? Remove only HD? Remove all 3 same time?
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bas2754Commented:
Unless it is under warranty with Toshiba you will need to find someone to repair it as it is most likely a mainboard as John says.  Before you take it into a repair shop, however call Toshiba to find out if they will repair it and what the cost would be so you have a reference.

You may want to consider replacing it if it is older than 3 or 4 years.
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eemoonAuthor Commented:
Do you have any idea to get the data from the harddrive ?
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JohnBusiness Consultant (Owner)Commented:
You can remove the hard drive, put it in a carrier, and attach it to a working computer. If the hard drive is good, you can get data from it.
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BillBondoCommented:
Sure. There are adapters for LT HD to connect to any other computer via USB.
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eemoonAuthor Commented:
Can I buy carrier or adapter in ebay ?
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BillBondoCommented:
Yes, but goto local electronics place. faster, easier. explain what you need to do...
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JohnBusiness Consultant (Owner)Commented:
I picked up a carrier locally and they are not expensive - $25.
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JohnBusiness Consultant (Owner)Commented:
@eemoon - Thanks and I was happy to assist.
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helpfinderIT ConsultantCommented:
basically it is to get more power for your HDD. so use regular USB port (both of them). it is only a fact that USB port has max 500mA, if disk needs more you can use such a cable and power it from 2 USB ports (2x 500mA).
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eemoonAuthor Commented:
Hi I took the hard drive out of the old laptop. and connected it to the new laptop. from there I can see the hard drive, but I cannot see some of folder even if i  checked the folder option to show hidden folder.  Do you think something is wrong ? thank you
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JohnBusiness Consultant (Owner)Commented:
If you cannot see all of the data it means the hard drive was either corrupted by an operating system failure or by a hardware error on the disk. In either case, unless the data was critical, take what you can and write the rest off as lost.
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