Disconnect signal cable if monitor show massage no signal check signal cable then monitor is ok then open cpu check whether dust is in ram then clean the dust and again fit the ram the problem will be solved if not then disconnect ram listen beep and if contineus beep comes then motherboard is ok if no beep then motherboard is faulty replace it
disconnect signal cable if monitor show massage no signal check signal cable then monitor is ok then open cpu check whether dust is in ram then clean the dust and again fit the ram the problem will be solved if not then disconnect ram listen beep and if contineus beep comes then motherboard is ok if no beep then motherboard is faulty replace it
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