I have Pentium 4 computer, for a couple of weeks  having problem in computer power supply, My computer doesn’t start, till I unplugged  the power cable and then insert it again in power supply,  this is also happens when  I plugged other hard drive as slave,  what will be the cause of mentioned problem ?

I have 100 computers to be used by different groups of people including, secretaries and Engineers. I therefore would like to make an estimate of the amount of power supply to an office building which will house all these computers. The composition of these computers that are owned by my client is in two types with nameplate rating on the CPUs of: A) 110V/6A; B) 100-127V/8A. 120V will be the nominal supply.

I want to know if it’s possible to calculate the total amount of power supply that I can use with my 452 computers to be used by different groups of people including secretaries and engineers. If so, how can I do that? Please provide step-by-step instructions. Thank you.

I want to use my two year old case to save some dime. I want to know if this will affect or could be an issue. This is the site about my case:  I also want to know some information about my PSU. What brand and wattage is efficient to use? Help please.

I have windows XP with 160 GB hard disk and 512 mb RAM . Whenever I try to turn off my computer windows shuts down but the CPU does not. I have to take the plug off to shut it down. How can i resolve this?

I bought new power supply recently for my p4 computer but when i going to plug in the power cable on it,sometimes it sparking. Me also changed the power cable but sometimes still have same problem,Sometimes it work good but sometimes it spark.

I am trying to replace the power supply on my brother's computer. he is a toddler/kid and the computer is nothing fancy, its actually my wife's old Compaq pre-built.

Anyways, the power supply is shot and I was going to replace it but didn't want to spend more than $50 on it.

The specs of the current one (per the label):

60Hz/50Hz

+5V – 25A
+12v – 8A
+5vsb – 1A
+3.3v – 14A
-12v – .8A
-5v – .5A

Can I replace this power supply with one such as THERMALTAKE TR2 600W or Muscle Power True Power 500W ?

Which is better?

Hello,

Yesterday, I went to a friend of mine to check his PC.

I opened the case and it was full of dust and we both decided to do a clean up (we didn't used any liquid-based product).

After we took care of every component we put them back all together and plugged it in. As soon as I pressed the power button, the whole PC lighten up as if it was about to explode. I then plugged it out and waited for a few minutes.

We then decided to check if it still works and to our amazement it turned on without any problems.

Do you have any idea what might have caused it as it was really dangerous?

I want to do my best to avoid this kind of situation.

I used my WIndows 7 laptop all day yesterday and I had no problems with it. This morning though, when I turned it on, it would restart itself repeatedly. At first I thought it was a virus, but my scan picked up nothing and someone suggested it was a hardware problem. Before I bring this laptop to a computer hardware shop, are there possible work arounds?
 

Hi,

"There is a problem in my laptop battery. I have buy it 3 months ago, the first time its battery timing was 1 hour but gradually it becomes low as time passed. Now it cannot charge. What is the problem in my laptop's battery?