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Re: need help think i may need a motherboard
If the the laptop is failing to boot very early in the4 boot sequence, then this usually points to a failure somewhere on the motherboard. There are a few test you can run to try.
1) Try downloading the following Diagnostic program and running it on your computer. The download makes a bootable CD, and you can try running a bunch of diagnostics on your computer with out having to boot into Windows. You can test memory, the hard drive, and other things.
2) Try replacing the memory. Sometimes bad memory can cause a device not to boot.
3) If neither of the above suggestions work, then I'm afraid you will need a new motherboard.
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For fixing computer automatically shuts down issue, you shall remove the
motherboard and reconnect all the connections. Take help of a hardware
expert while doing the task. The solution to fix computer automatically shuts down is to download and run a good and reputed Registry Cleaner software, use RegInOut to fix this problem.
This is most likely a video graphics failure (just like the lines that you saw when computer is still running). For some dell computers, specially a laptop, the graphics card is built in to the motherboard. For the computer that blinks for a few seconds and turning itself off, the computer is no longer performing it's POST (Power on self test). If the computer is under warranty, try contacting Dell or if not, try contacting a local technician to have the motherboard replaced.
you have not stated the model but try rebooting whilst applying some pressure where ever the the cpu fan is mine was at the top right and found that the continuing heating up and coolind down of the processor had caused bad solder joints if this is the case you will need a really strong magnifying glass at least 10x and a pin point soldering iron to repair it
try this, unplug dc plug from laptop. remove battery. wait a few minutes. press and hold the power button for 10-15 seconds. plug the dc power plug back into the laptop, but do not put battery back in yet. Then try to power on. if it powers on, let it run a few minutes, but best to keep checking to see if it is getting warm or hot anywhere. if it is getting hot shut it down immediately. If it isnt getting hot then shut it down and put the battery back in.
if it doesnt power up, then i would have to suspect heat damage to the motherboard.
You may have a RAM chip issue or at worst a motherboard problem. On the Microsoft website, they offer a memory test tool that you can download and run to test the RAM in your laptop. If you have a way of checking your RAM chips on another laptop you can use this method as an alternative to the memory test.
If it is an overheating problem try turning the laptop off, turning it over and placing a vacum on the fan grill on the bottom. Many laptops get a dirt buildup internally and this will sometimes suck out the dirt.