Dell CA, are you a technician, or a public relations person? You seem to appear only when somebody poormouths Dell.
It would be good to know why you think it might be a motherboard problem, so we can learn from you.
The user reports he bought the computer in India, and that it is out of warranty. He also called Dell and was frustrated by
There is no reason I can see to believe it would be a power adapter issue. Since he can see the WiFi light, the CD ROM blinks, Power light goes on for 45 seconds. He called Dell in Bombay and did not get a good response (whatever that means).
Please tell us more about how Dell customer assurance online works, so we can learn to help others as you have helped Mujib.