PSU went up in smoke. New PSU won't boot PC

So my 3 yr old Cooler Master 500W PSU went up in smoke today and I replaced it with a new 600 watt PSU.

I believe I have made all the connections properly and when I switch the system on, the PSU lights up, the fans work but there is no output on the monitor and even the keyboard doesn't work (pressing on CAPS key doesn't light up the LED). The green LED on the DVD RW stays lit but the tray doesn't come out

My specs are

1. Gigabyte 78LMT USB3 Mobo
2. AMD FX 4100 CPU
3. HD Radeon 5450 GPU
4. Crucial MX-100 250 Gig SSD
5. Seagate 500 GB HDD
6. Seagate 160 GB HDD
7. Corsair Vengeance 4Gig x 2 RAM
8. 600 Watt PSU (installed just today)

So far I have done the following.

1. Unplugged the cabinet and pressed the Power button for 1 min. Did nothing.

2. Took off the GPU and attached the monitor to the onboard graphics. Same results.

3. Removed the CMOS battery for over 5 mins and reattached it. Same results.

4. Removed the RAM sticks and tried one at Slots 1, 2 and 3. Same results.

5. Removed all the RAM sticks (with GPU still off the board) and powered on the system. No beeps.

6. Removed the SSD and tried attaching it externally to my laptop, but it wasn't detected. Could be a faulty SATA to USB connector. I bought it cheap from a local market.

Please advise what steps to follow next

Many thanks in advance

1 simple answer.

600W PSU is not enough for your computer as there are overload with too many component need power.
Hence, the 500W PSU go up in smoke.

Do a calculation how much PSU your need to get, as each component need certain amount of power.

You also need to get the "power surge protector" to avoid further damaged.

Thank you for your responses, guys.

I too was concerned about my SSD going bad, so the first thing I did after I woke up today was attach the SSD internally to my laptop and it worked like a charm. I was able to boot in without any issues.

So this rules out any issue with the SSD. Thank God for that.

One more thing I'd like to mention that when I start up the system, there seems to be no activitiy in my HDDs. The reason I know for sure is because

1. The LED on the cabinet indicating HDD activity doesn't blink.

2. The 160 GB HDD is a pretty old drive and it makes a noise the first time it starts up but now it doesn't.

bigmck said:

I changed out my PSU a while back and had a similar problem. Make sure the 24 pin cable makes a "Click" when it goes on the Motherboard. == I hate to say it but Mellon Head may have hit on something also about your Motherboard being gone, I hope not. Does your CPU fan turn, that will tell you if the Motherboard is out.

Yes, my CPU fan runs and it is connected to the CPU Fan pin on the MoBo and not powered directly by the PSU

Eric3742 said:

1 simple answer.

600W PSU is not enough for your computer as there are overload with too many component need power.
Hence, the 500W PSU go up in smoke.

Do a calculation how much PSU your need to get, as each component need certain amount of power.

You also need to get the "power surge protector" to avoid further damaged.

Thanks for your response.

I have a power surge connector (guess it's the same as spike buster) attached and the last 500W PSU ran for 3.5 yrs. I believe it wouldn't have run for so long if it was underpowered.

I have a 3 yr old PSU from my previous unit that was just lying around in the corner. Would it be safe to attach that PSU for testing?