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Computer when i press the power button of my computer only the led lights of power,hdd,optical drive are lighting up. there is no display and the processor fan is also not working. whereas the fan of the supply unit is working. this happened after a failed bios uodate. what should i do.

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  • Acer Master
  • 3,400 Answers

Sarath,clear CMOS it may work or not.you don't loose any Data.

Posted on Jul 21, 2013

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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jtuckerj
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SOURCE: HP computer doesn't turn on

Your power supply is bad--you will need to replace. I suggest looking at tigerdiect for a replacement.

Posted on Dec 12, 2008

ButtFuzz
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SOURCE: Gateway MT6451 Does not turn on

Probably the mainboard or flaky power supply.

I'd start by replacing the power supply. Buy one you can use in a new machine, though... or "borrow" one from another machine.

Posted on Mar 11, 2009

SOURCE: optiplex 755 flashing orange power button light only

Sounds like you only have power going to your motherboard.

The power supply might be bad on it, that or maybe the power cord is going bad and is only letting a small amount go through. I don't see why there should be a problem if you have even a little bit of power going though.

Posted on Jul 11, 2009

  • 4234 Answers

SOURCE: COMPAQ PRESARIO S5200NX WON'T START - Press start

Make sure that the CPU fan is clean and free to turn. The main fan should have a connector with 3 wires. Two are for power and the third returns the fan revolution count. If the fan is not being seen as spinning, the system will shutdown.

Dan

Posted on Nov 06, 2009

Techie2core
  • 42 Answers

SOURCE: My emachine T1742 desktop will not turn on. When

Disconnect all the devices from the computer(tower) including keyboard, mouse, monitor(everything)..even the power cable

Now keep on holding down the power button on the computer tower for 15-30 seconds..

Now release the power button, plug in the power cable, monitor, keyboard, mouse and turn on the computer...

If it works, great!!!

Otherwise, take it for repair..

Posted on Dec 03, 2009

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Why does my ASUS laptop have no display? The fan and optical drive are working.


Do you have an HDMI cable to hook it up to a TV with? If so, try that. If it works, try updating your graphics card (I can show you how if the cable works)

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sounds like your motherboard malfunctioned. the board was probably starting to go out. thats why it would see the hdd then not.

you sound like youre familiar with computers. you may want to invest in diagnostic cards to troubleshoot problems like this. theyre fairly inexpensive on ebay. basically you insert the card into pci slot and it displays an error code. then you look up the code in a book. works like the obd2 reader for your car.

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E2 error on pro form 730 key in belt and motor run about 5 sec and shuts down sensor light blinks but not a steady light


Dear Sir:

I will try to help you, use the patience and carefully: need screwdriver, hex, allen+Dvom(DigitalVoltemeter)


Troubleshooting: ERR2 - Motor Movement

Since the motor moves when you press speed up, focus on the optic sensor, its wire connections, and the

optic sensor wheel. If all seems well at the sensor, inspect the motor.

Optic Sensor

??? Optic sensor wheel - Make sure that the optic sensor wheel rotates securely, without wobbling, in the

middle of the optic sensor. Realign and tighten if necessary. If optic sensor wheel teeth are missing or

bent, replace the optic sensor wheel.

??? Optic sensor wires - Make sure that wires are inserted securely to the optic sensor and to the drive board.

Check wire continuity.

??? Optic sensor - Turn on unit power. Turn the motor flywheel with your hand. The optic sensor

indicator (LED10, drive board) should light. . If it does not light, and all parts above are

good, replace the optic sensor.

Motor

??? Motor arcing - Does the motor show signs of wear - irregular arcing, carbon dust?

??? Motor brushes - Do brushes show signs of irregular wear - cracks, dents, lines? Replace the

motor brushes.

??? M+ M- Wires - Make sure wires are connected properly.

Other

??? Display main IC - To ensure proper signal processing, press down on the main IC on the display

board, marked U5. .

??? Ribbon cable - Ensure that the ribbon cable is attached at the drive and display boards. Check cable
continuity.

Troubleshooting: ERR 2 - No Motor Movement

Turn unit power off and then on to clear the ERR2 message from the display. To test whether the drive

board is putting out power to the motor, insert multimeter probes on the M+ M- connectors and press

the speed up key. . (Note: To avoid ERR2.)

Power to Motor

If the drive board puts out power to the motor, but the motor does not operate, either the motor wires or

motor is malfunctioning. Test wires for continuity. Inspect connections. Perform an ohm test on the

motor . Inspect motor brushes.

No Power to Motor

If there is no power to the motor, either the signal is not arriving at the drive board, the transformer

or inductor is bad, or the drive board is bad. Inspect the following:

??? Display - Does the display beep when you press speed up? If so, the display has sent its signal.

If not, inspect overlay-to-display connections. And press down on the main program IC, marked U5.

??? Wires and their connections - inspect data cable connections from the display to the drive board,

test data cable continuity, inspect M+ M- wires from the drive board to the motor.

??? Inductor (6310 only) - inspect inductor and its wires and their connections. .

??? Transformer - inspect the transformer and its wires and their connections.

??? Drive Board - inspect the drive board for burnt or cracked components. Inspect LEDs (See DRIVE.03

and DRIVE.04). Press on the drive board IC chips to ensure good connection. If the power indicator on

the drive board, LED8, lights, but there is no power to the motor, and other components are good,
replace the drive board.

wITH THIS YOU FIX IT. If you need further assistance, please reach me

SINCERELY. GOD BLESS YOU.

E.CUADRA
MANAGUA, NICARAGUA. C.A.

Oct 20, 2011 | Exercise & Fitness

1 Answer

I started setting up an intel d865perl today and i'm pretty sure i did everything right, i followed diagrams read manuals and such but when i plug in the power cord it immediately starts and there a green...


1. There is a BIOS SETUP setting to "automatically start after a power outage" -- this is useful for "servers".

2. If you press and HOLD the power-button for TEN seconds, the computer should shut itself off.

3. Turn the computer off, disconnect the "data" cable to the HDD (hard-disk-drive) and then turn the computer on. Does the HDD lamp still light-up?

4. Do you get any on-screen video when it starts to start-up?

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When I push the startup button, the green light turns on the cooling fan start's just for an instent and shuts down. Even the Green light on the back of the computeris now turnes off. Any idea's to fix...


hshorty,

When you press the plastic Power On button, it in turn presses against a Power On switch.
The Power On switch is located inside the plastic Power On button.

This is an example of a generic ATX Power On switch,

http://www.directron.com/atxswitch.html

The switch completes a circuit.
(The Power On switch is a Momentary Contact Switch. Makes a brief contact, then opens back up)

The circuit the Power On switch completes, is the 5 Volt Standby circuit.
When a Power Supply is plugged into power, there is a constant 5 Volts (DC) present.
Closing this 5 Volt Standby circuit, momentarily 'excites' the Power Supply, and turns the Power Supply on.

Power goes to the Motherboard, and Peripherals, (Harddrive, optical drive/s, and so on)
The first chip to receive power is the BIOS chip.
(Chip and Chipset are slang terms for I.C. Integrated Circuit)

The BIOS program on the BIOS chip, looks to see what devices are installed, does a Ram Memory count, TURNS the Processor on, and hands the computer over to the O/S.
(O/S = Operating System. Windows XP is one example of an O/S)

Your Power Supply doesn't even have enough power to light those LED lights, much less turn the Processor on.

A) ALL the LED lights together, use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts.

C) A typical Processor can use 51 to 125 Watts. Depends on what Processor it is. (Older Processors use less than 51 Watts)

If this problem is in reference to a Compaq Presario SR5130NX desktop computer, it comes with an Athlon 64 X2 - 3800+ Processor.

(Windsor Core. Also this Processor uses an AM2 processor socket)

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01048297&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=3436820

This Processor can use up to 89 Watts.

http://en.wikipedia.org/wiki/List_of_AMD_Athlon_64_microprocessors#.22Windsor.22_.28F2_.26_F3.2C_90_nm.29

Fans start to spin, and the LED power light is on for the Power Supply. When it's time to turn the Processor on, too much power is needed, and the Power Supply 'drops to it's knees'.

The Power Supply used is just a common ATX style of power supply. (Actually it is an ATX 12V 2.x)
Used in a LOT of personal computers out there, and is readily available.
It's a 300 Watt unit.

(The ATX form factor for this Power Supply, (Size and shape), is approximately 6 inches Long, 6 inches Wide, and 3-1/2 inches Tall)

Power cables from the Power Supply needed are;

A) 24-pin ATX main power cable (Main power cable to motherboard)

B) 4-pin ATX +12 Volt power cable, (Also known as P4)

C) At least one SATA power cable for the SATA harddrive, and additional SATA power cables, for each SATA optical drive.

(Your Presario may have come with SATA optical drive/s, or IDE {PATA} optical drive/s. Optical drive = CD/DVD drive)

D) If your Presario came with IDE, (Also known as PATA), optical drives, you'll need a standard 4-pin Peripheral power cable, for each drive.

E) The computer case fans, may each use a standard 4-pin Peripheral power cable. (The Processor fan attaches to the Motherboard)

F) The Memory Card Reader needs a Floppy Drive power cable. An auxiliary power cable.

An example of a compatible Power Supply,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4465483&CatId=1079

(Wasn't supposed to be stated as a Clarification)

Jul 29, 2010 | HP Compaq Presario SR5130NX PC Desktop

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Are you sure it is a good MB? If so double check all connections and try again. If you still have problems post back and let me know if you are getting any beeps at startup.

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Imac g5 17 gets some power but no display


Assuming you have the model with four diagnostic LEDs, the lack of LED-3 indicates that the computer and the LCD display are NOT communicating. This LED should be ON when the computer is turned on and video signal is being generated.
The first solution is to reset the PRAM (hold command-option-P-R after the boot chime until you hear another boot chime). If video does not appear, then power down the computer and reset the SMU by pressing the SMU button ONCE ONLY. (The SMU button is located just south of the fan housing and is the button further away from the fan; the other button is a power button.) If this does not fix the video, the next step is to remove the optical drive. If this does not fix the video, put everything back together and attach an external display using the dongle supplied with the unit. If the external display fails to work, you have a logic board problem; otherwise, you have an LCD panel, inverter, or cable problem.

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How do i plug in power button in on mother board? Lost my manual so I can't find the model #. I was just switching my mother board and all other hardware to new case and my power button (or switch or...


> power led,

Runs to the LED (Light Emitting Diode) labelled "power" on the front of your computer-case

> H.D.D led,

Runs to the front-panel LED that lights-up whenever the Hard Disk Drive is being used.

> reset sw,

Runs to the "reset" button on the front panel.

> speaker

Runs to the internal speaker

> s/b sw

Very briefly touch a metal-tip screwdriver between these 2 pins.
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Intel D850MV motherboard


If you hear no beeps and the led lights, and the fans stay on after striping all the components from the motherboard except for the cpu, and power supply, you have either fried your motherboard or your cpu. Its impossible to tell without more testing. I'm sorry but you either need someone to test it or you can buy a new computer (thats what I did). For about USD $300-$400 you can get a brand new computer with 500mbs of ram, 120gb hard drive and a 3 ghz cpu. If you look around you can get an even better deal.

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