Hello! I have a IBM R40 laptop. Unexpectedly, the comp screen goes VERY DARK...to the point where I cannot even see the cursor. It's almost as if its BLACK, but not pitch black. There is some visibility, but i cannot see where the cursor is. PLEASE HELp! Do i need to change the light bulb or something? The comp runs normally for only 5 mins when i turn it on, then after 5 mins, the comp screen goes dark and i cannot see anything...but the comp is still ON.
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Re: laptop's light is turning off!
This is going to be a problem with either the screen inverter, or the screen backlight. I would recommend have it diagnosed first to see which it is. You can test this yourself if you have an ohm meter, and a little technical know how.You will need to pull the screen bezel (the plastic piece around the front of the screen), the are screws hidden under the small round plastic sticky tabs on the bezel. Once you've removed the screws the bezel will snap off. Get it started at one side and work it up the rest of the way around, be careful not to break it ar the corners when lifting it off. Once the bezel is off you will see the inverter at the base of the screen. Power down the machine and disconnect the lead that goes to the screen. The power going into the inverter is very low, the inverter boosts the power back up to what the screen needs to work, so the power on the screen end will be significantly higher than the motherboard end. The voltage range differs machine to machine, so I can't tell you what it should be exactly, only that if it's the same or slightly higher from end to end, then it's bad. Now, inverters can be changed out, but backlight are part of the screen and cannot be change out. If it's a bad backlight, then the entire screen will need replaced.
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remove the battery and adapter. press power button for 30 sec. then connect the adapter. press power button. if this didnt work. you need to ask for an help of a local tech to check for the video card and cable.
The problem youve discribed does seem to point to your back light has failed on the laptops lcd display, i dont know exactly how this would accure just using a projector though, go into bios again and try loading factory settings.
This problem could also be the inverter if you cant make out even a slight image on the screen.
The IBM beep code error 1 long 2 short beeps means there is a video card fault. Reseat your RAM because the video card uses some of the RAM. If it doesn't work then the video chip on the motherboard is faulty, the only way to fix is to replace the motherboard - this may not be a cost effective solution.
Connecting an external monitor to the laptop won't work because the video card also sends data to the video port.
If the the ram is the problem of your system, there should be a power on light on the system. indicating that some of the component of the system is not working correctly. But since you mentioned there is no light, it is the possibility that the problem is the motherboard itself.
This could be a battery problem. Remove the battery and start on the power supply only. If this doesn't work, then check the power supply with an ohm meter to see if it's getting the proper output to the machine. If the supply checks good, then I'm afraid that you have a problem component on the motherboard, and will need to have it professionally diagnosed in order to track down the exact problem component.
Since a used R40 will be in the neighborhood of $300, a $100 or less for the screen might not be too bad of a price. Without the screen, you have a $330 paper weight. With the replacement screen, you have a working computer. And that would cost you $200 less than buying a replacement R40. Hopefully this line of thought will help you make the decision. R-