PC doesn't start

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Hello,
My pc was refusing to start normally, since some time. With poweron button, and PS220V button switch on, pressed simultaneously, it starts normally. (sometimes). Otherwise, pushing the power button, power supply starts, with the fan moving, but panel fan, (connected to MBoard), and also the CPU fan, do not move. Sometimes we can see a small step to moving, on the CPU fan, in startup trials. The cpu seems to work, because it becames hot after some seconds. Do you have any clues?
thanks, Luis

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Hello, as a start I suggest you have a look at this article on what to do when your OS won't boot.

Let me know how you get on!
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Hi David, I have done must sugestions done on web pages. Try start without ram, with all hardware disconnected etc. I only hadn't done a Bios clean, but I do not think the problem is there. There is no start at all, to see bios problem. As I told, the only thing seen working after pushing the pwron button is the PS fan. The cpu should be working because, the refrigerator starts to be warm. This is a HP pavillion t000 board PTGDI-LA from Asus. Using pwrbutton and mains power on, simultaneously, the unit starts working normally, (sometimes), as it be at the moment. If I do a reboot, the unit starts normally again. I have done that. It seems that there is not enough power to start, or something wrong on the board. The fan on real panel is connected to motherboard, and also the cpu fan, and they do not start also. Sometimes there is a small movement on cpu fan, upon power button pushing. I have never seen this before. I can say also, that I have replaced some capacitors, 6 that were "FAT". I have cut them, and replace with new ones just soldering to the old pins, just to avoid problems with "hot" and connections thru the holes of several layers of the board. (I have done that in an old IBM, at several years ago, and it is still working normally). Do you know how the board sources power to the fans? Is there a transistor that does a switch effect? If so, the switching action could not being done at all.
Thanks, Luis

So what indication do you get when trying to boot without the ram? Do you get the same indication as when the ram is in? If so then the motherboard is to blame as it is in common regardless of ram or not. It sounds as though the soldering of caps might be the culprit.
I do not notice any difference when the system doesn't come up. With or without RAM. With or without GraphicCard inserted. I have tried also two other power supply. I am thinking also that could be a capacitor, another one, that could be dead, and creates a short in the start. Have you heard such thing, from anyone? I am retired now, and I have worked in ground stations communicating with satellites. I rememeber that some equipment's that are normally working for a big life, several years, after disconnecting, they refuse to start again, because capacitors became dead, and act as a short circuit, in starting act. Who knows? Today, a few minutes ago, I pushed the pwr_on buton and system started normally. "The power supply was left connected, since yesterday". I will do more starts along the day, just to see. Nevertheless, it would be very difficult to find a problematic capacitor, unless it shows a fat top.
I have just done now, a shuttdown, and a restart, and everything went ok!
Thanks, Luis
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Thanks for the update. Fingers crossed it keeps working!
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Check for power supply issues. ...
Make sure it's not a slow boot. ...
Make sure your monitor or display is functional. ...
Eliminate external hardware. ...
Reset memory modules and internal components. ...
A few more reasons your PC won't turn on.
Hi all, this pc, is again with the problem. As I told in beginning, the PS fan starts, but Mobo and cpu fans don't start. I have tested 2 other PS. There is also no image in display. I have replaced several capacitors, that were "fat" in the top, and after that, I have tested the machine several days, without any problem. Yesterday, after sometime without use, the PC does not start again anymore. Another symptom is: if we do not disconnect PS from mains, the cpu became very hot. In some way, the processor should be working, and creating hot, that the fan does not extract, since it is not working. Strange. There would be not enough power to let cpu and fans start. Something on the board is "eating" the power.
Luis Fernandes

If you have soldered on the board just go get a new motherboard.
> AlreadyencryptedDOH
Hi the replacement of capacitors went ok. I have just cut old ones, and soldered the news just on pins left up. It is not a good idea to hot the motherboard itself. I have don that in 2 old motherboards from IBM towers, at 6 or more years ago, and one is working perfectly yet, and the other died last month, but for another reason. So, the problem is not on the change. Moreover as I told before, the problem was present, the same from the beginning. This is a PC with XP, and is needed to deal with a program factuPlus, from old times. It doesn't work over new computers, only using Win10. I have bought a new machine, from the factory, just "old", to be used with XP OS.
I keep trying to find a reason. Thanks for everyone.
Luis
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I think Ram main problem in your PC
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Thanks for the update