Cable 2 * NH-KW2 * 1.. what does the first 2 mean? KW and what does it mean?
If there is a motherboard test card, you can use the motherboard test card code to see what is the problem, if not, then through the exclusion method. You like this situation, in the boot state has not press the keyboard on the NUMLOCK this key to see if the keyboard will not light? Will be bright, it may be poor video line contact, not bright, then see the following. According to your meaning, first remove the memory, you can wipe the cheat, and then re-inserted or replaced a memory. And then start to see if it can not be displayed, then the graphics card also plug (integrated graphics can ignore this step). Or do not show it, then put the CPU removed, wipe the metal contacts, and then re-put back into the CPU slot, or change the CPU again to see if the boot can not show. These steps take a few more times. Or not, then it is the motherboard point is not bright, the motherboard may be the problem, you can try to pressure a few North and South Bridge chip, no words on the out of maintenance it.
Protel99se can use the key on the keypad to achieve the template plus vias, notebooks, although there is no physical keypad, but you can press the keyboard Fn + NumLK open the keyboard, and then you draw the PCB when the P key Can be achieved for the layer plus vias.
Two cases 1: The monitor power light is on. The logo of the monitor brand is displayed when the monitor is turned on. Then black, do not show other things. 90% of this situation is the computer host problem, the general situation to pull the host memory, wipe the gold finger with an eraser, and then install back (the installation note the location of the card slot). There is a host if there is a separate graphics card, pull out the discrete graphics, but also wipe the graphics card cheat, and then install back try 2: monitor power light. But it's dark. And then press the monitor power to open the light, but also can light up, and then black (here is the light that in addition to display the display logo, but also display the desktop. NUM lights on the keyboard can light up), then the display is the high voltage plate Or the lamp has a problem
