I was installing a DVD drive but it went into problems, I was testing, plugging and unplugging the power cables and the SATA cables whole night
Sometimes it powers but sometimes it doesn't. The weird thing was sometimes as I pressed the power button, the hard drives were heard running / spinning up while the MOBO and chassis fan did not spin up at all.
At last I decided to unplug everything and suddenly realized that the big power cord to the MOBO was LOOSE.
That should explain why the MOBO and chassis fan did not start to spin on start-up.
While SATA cable to hard drive is very tightened. I really do not understand why the more important power (to the MOBO) could be that loose. (i.e. so easy to unplug it
Sometimes it powers but sometimes it doesn't. The weird thing was sometimes as I pressed the power button, the hard drives were heard running / spinning up while the MOBO and chassis fan did not spin up at all.
At last I decided to unplug everything and suddenly realized that the big power cord to the MOBO was LOOSE.
That should explain why the MOBO and chassis fan did not start to spin on start-up.
While SATA cable to hard drive is very tightened. I really do not understand why the more important power (to the MOBO) could be that loose. (i.e. so easy to unplug it