no signal to monitor and keyboard.

April 1, 2010 at 01:03:00
Specs: Windows XP
While iam opening few documents from CD drive continously, the system restarted.During the next time its ask for safe mode, but unfortunately i was selected normal mode. after that whenever i try to switch on the PC, i am getting a blink on keyboad after that no power supply to keypboard and monitor. iam getting power supply for CD, the CPU is running (mean to say, fan above the processer is working, CPU fan iw working,power supply to mouse, power supply to Kayboard.)
my pc contains mercury motherboad. OS installed: WindowsXP
Can anyone help me? Thanks.

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April 1, 2010 at 12:19:00
mmmclarify... is the monitor powered via the PC (they ofttten werre in the olde days); or is the more common/normal way - plugged directly ito its own mains socket?

Do you see anything on the screen at all?

Have tried pressing fF* during boot up to get to boot-menu etc.?

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April 7, 2010 at 05:07:03
There is no signal for monitor.
No i have not tried with pressing fF*, bcz keboard is not working.

Is there any chances for mother board failure?

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April 7, 2010 at 06:27:28
If this is a desktop computer , it sounds like your power supply is starting to fail. That can cause both no video and no response from pressing keys on the keyboard.

Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:

If it is failing, you can usually replace it with any decent standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo PS.
See response 3 in this:

Your power supply must have at least the minumum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should get.

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April 7, 2010 at 06:38:19
mmm - keyboard not working too... no vga output either... Much as "Tubes..." suggests... this may be power-supply issue or a motherboard...?

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