hello,
lenovo n100 no display.the laptop comes on the 3.3v & 5V okay no problem also clock gen fine cpu get hot very little.I have also flashed bios with working new one.what could be the problemm with the laptop

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repairs of laptops and selling of components

What is showing the external monitor? What is a power of bridges, the processor, memory? What does card Post of codes?

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Нет слова не умею, есть слово не хочу уметь.

In some lenovo n100 heatsink retention frame may have problem.
It have connection with one of CPU power plane.
Remove it and try swith on the laptop.

which post card to use with this as it is only a pci-exp slot and they have no debug cards for this .what signals do i check in this that can troubleshoot the problem fast like test points with oscilloscopes

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repairs of laptops and selling of components