Question about PC Desktops

1 Answer

What does No Power/No POST Troubleshooting mean

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 737 Answers

Hi.
It refers to two symptoms. No power just means the machine is dead and nothing happens when you press the power button on the computer. POST stands for Power On Self Test. This is what happens just after you press the power button - the computer checks devices connected to it then starts to load Windows or whatever operating system you have. If the computer is dead, then it is often caused by a faulty power supply (metal box where the power cord goes in. If it won't POST then an error may be displayed to tell you where it stopped during POST, or error beeps may sound to tell the technician which part of POST has failed. Sometimes, you may hear the fans and hard disk, but the monitor stays dead. This is usually caused by the RAM coming loose in it's socket or the video card coming loose/ failing.

Mark

Posted on Jan 22, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When rebooted computer beeps 3 times and will not turn on


Is it a long beep or a short beep? Beep codes are used by the BIOS during the POST to report certain initial system errors.

If you're hearing beep codes after you turn your computer on, it typically means that the system has encountered some kind of problem before it was able to display any kind of error information on the monitor.

Follow the steps below to determine what system problem the beep code is representing.
Difficulty: AverageTime Required: Anywhere from 10 minutes to a few hours depending on the cause of the beep code

Here's How:

  1. Power on the computer or restart it if it's already on.

  2. Listen very carefully to the beep codes that sound when the computer begins to boot.

    Restart your computer if you need to hear the beeping again. You're not likely to make whatever problem you have worse by restarting a few times.

  3. Write down, in whatever way makes sense to you, how the beeps sound.

    Important: Pay close attention to the number of beeps, if the beeps are long or short and if the beeping repeats or not. There is a big difference between a "beep-beep-beep" beep code and a "beep-beep" beep code.

    This is all important information that will help determine what issue the beep codes are representing.

  4. What steps you take to solve a particular beep code will differ depending on the BIOS manufacturer.

    Choose the correct beep code troubleshooting guide below based on your motherboard'sBIOS manufacturer:

    Tip: Not sure what brand of BIOS is on your motherboard? See this How To Determine Your Motherboard BIOS Manufacturer guide for some helpful advice.

Tips:

  1. Still can't figure out what the beep codes mean? Let a community of computer support enthusiasts help out! Post the details of your problem in the PC Support Forum.

Jan 03, 2013 | Dell Precision T5500 Computer Workstation ...

Tip

How to isolate issues between hardware and software


<p>It has been one of the dilemma of computer users is to identify what is really causing the failure in their computer. Often they think that they bought a defective product since they are getting these kind of errors in the computer. Having an error on your machine does not mean that the machine is defective or needs parts replacement. for all we know it might just need some simple troubleshooting steps to fix the issue. Here is a tip where you would be able to know if you need to bring your computer to a service shop for parts replacement or you can try to fix it at home by doing some troubleshooting steps that would help fix software failure in the computer system.<br /> <br /> On a Windows based operating system, you should always know when the issue happens. It will help much to observe your computer on how it boots up and what it does before you get to the desktop screen. Take a note on where and when exactly the error occurs.<br /> <br /><b> Power Failure:</b><br /> <br /> This is an issue where there are no lights on the power button of your computer, whether it is a portable system or a desktop computer. Obviously this is a hardware failure. surprisingly, discharging the flea power of your computer sometimes resolves these kinds of issues. Otherwise, you will definitely need to have a local technician look at your system for parts replacement.<br /> <br /><b> Note:</b> flea power is the charged power of our computer system. A computer system is made up of electronic components such as capacitors which hold electronic charges. To be able to discharge it, you should disconnect all power source from your computer and hold the power button for at least 5 seconds.<br /> <br /> <br /><b> POST Failure:</b><br /> <br /> POST is an abbreviation for Power On Self Test. as the name implies, it is the test that a system goes through to test the basic hardware components needed for a computer to boot. The components that it tests are as follows: Processor, BIOS (Motherboard), Memory, keyboard and video card. If there is a POST failure, the system would give you a black screen with lights on the front panel. Sometimes it will give you beeping sounds which would normally mean that you have a memory failure on your system. If you encounter such issue, you will need hardware technical support to guide you isolate further on what could be causing the failure.<br /> <br /><b> Boot Failure:</b><br /> <br /> Boot failure is when the computer is able to complete post. You will be able to know this if you hear a single beep on your computer. Isolating a boot failure from a post failure simply requires you to boot to the System Setup/configuration Screen (BIOS). If you are able to get to the BIOS, that means all the POST hardware component are good to go. However, booting to the BIOS differs per system. You just need to do trial and error on the following keys to tap as you turn your computer on.<br /> <br /> Del<br /> F1<br /> F2<br /> F10<br /> F9<br /> ESC<br /> <br /> To isolate an issue whether it is a software or a hardware issue, you just need to boot from the BIOS. If you are able to boot from the BIOS, chances are it is not a hardware failure and needs servicing.<br /> <br /> <p><img src="vincent_von_0.jpg" /><br /> <p><br /> If booting to the BIOS works, to further isolate the issue whether it is the advanced software, you need to boot to Safe mode. Safe mode is a troubleshooting state where only the basic applications and drivers are active. If you are having errors or boot failure, try to boot to Safe Mode. If you do not encounter the failure in Safe Mode, that means that there are advanced software being loaded in your operating system that fails. It is just a matter of knowing what that software is.<br /> <br /><b> Booting to Safe Mode:</b><br /> <br /> 1. turn computer on and tap on F8 before Windows starts.<br /> 2. You will be getting the Advanced Boot options. Use the arrow keys to get to the option for Safe Mode.<br /> <br /> <p><img src="vincent_von_0.png" /><br /> <p><br /> <p><br /><b> Safe Mode Definitions:</b><br /> <br /> Safe Mode: Just basic software are being loaded. Network drivers are not included which means no internet connection<br /> <br /> Safe Mode with Networking: Basic software and Network drivers are being loaded.<br /> <br /> note: for Vista or Windows 7, it includes wireless network drivers. This means that you can still connect to the internet with a wireless connection. In Windows XP, the wireless driver is not included even if you boot to Safe Mode with Networking<br /> <br /> Safe Mode with Command prompt: this is a troubleshooting state where you will be able to utilize DOS based commands.

on Jul 15, 2011 | PC Desktops

Tip

A Comprehensive Guide on Computer Beep Codes. (AWARD BIOS)


When a computer is booted up its BIOS, it performs a power-on self test, also known as POST, to test and verify the computers hardware and to make sure all components are working properly. Here's a comprehensive guide on how to determine which component has failed on a particular beep code and give you an idea on where to start for troubleshooting.

The exact meaning of the beep codes depends on the type and version of BIOS that you have. The three most popular types of BIOS are those made by Award, American Megatrends (AMI) and Phoenix. If you are using a PC made by a company that writes its own BIOS, e.g. DELL, HP, etc, you will have to consult your PC user's manual or the company's web site for assistance.


Beep Codes for Award Bios.

iantechson.png

1 long, 2 short = Video adapter error

Troubleshooting: Either video adapter is bad or is not seated properly.

Repeating (endless loop) = Memory error

Troubleshooting: Check for improperly seated or missing memory. Reseat the memory if you can.

1 long, 3 short = No video card or bad video RAM.

Troubleshooting: Reseat or replace the video card.

High frequency beeps while running = Overheated CPU

Troubleshooting: Check the CPU fan for proper operation. Check the case for proper air flow.

Repeating High/Low = CPU failure.Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat.

Troubleshooting: Check the CPU fan or BIOS settings for proper fan speed.


I will be posting more tips on other versions of BIOS.
Hope this helps.

on Mar 25, 2011 | PC Desktops

1 Answer

Dell GX280 orange light on MOBO


Dell Support > Optiplex GX280 Desktop PC > User Manual,

http://support.dell.com/support/edocs/systems/opgx280/en/ug/tindex.htm


I chose the Mini-Tower model because the following information applies to all models;
Small Form Factor (SFF)
Small Desktop
Desktop
Small Mini-Tower
Mini-Tower

Computer and Software Problems > Troubleshooting Tools and Utilities > System Lights,

http://support.dell.com/support/edocs/systems/opgx280/en/ug/tools02.htm#wp1114432

Now scroll down. What do the Diagnostic Lights indicate?
Post back in a Comment.

Regards,
joecoolvette

Oct 09, 2012 | Dell OptiPlex GX280 PC Desktop

1 Answer

Won't power up-- suppply OK


So basically you cannot get the pc to POST. Meaning you have just a black screen when you power on the pc, right?

First off, did you attempt to update BIOS before this happened. 90% of the time this is caused by a corrupt bios.

If you did not try to update BIOS before the problem started then try these troubleshooting steps.

1. Full power down. Unplug the power cord from the Power supply. Then hold down the pc power button.
Try to boot the pc.

2. Open the case and reseat the graphics card, hard drive, and RAM.

3. Take out one of the RAM sticks if there is 2 or more. Swap the RAM sticks in different RAM slots.

4. Set the Cmos jumper to clear. Power up the pc. Power down the PC. Set the Cmos jumper back to normal position, power up the PC.

5. Unplug and replug all the power supply cables.

6. Check the powersupply function. Either by a powersupply voltage checker, put the powersupply in a different pc, or try a different powersupply in the problem computer.

Jul 06, 2009 | Acer Aspire L100 PC Desktop

Tip

Simple troubleshooting of pc monitor


when your monitor turned on and in a second the led turned red..you have a problem...

here ar some tips so that you will troubleshoot it easily..

try to unplug your video adaptor of your monitor to your CPu.. then try to turn on your monitor that is unplug to your cpu..if there is a message says like.. "no video output" or "no signal output"..
it definitely means that your monitor is ok.. and the problem is in your CPU..

i will post another one for simple troubleshooting for your CPU...

on Feb 06, 2010 | PC Desktops

2 Answers

My dell desktop is just making a ticking noise and won't turn on


If it is beep sound the problem may be with the Ram. Remove the ram and refix it. If the problem not solved replace the ram

Jun 30, 2009 | Dell Dimension 4600 PC Desktop

1 Answer

Need to buy memory


Small Outline-DIMM or SOD only really applies to laptops! your post says you are desktop troubleshooting, is this true? if you post the make, type and model of your machine i will be able to tell you what the system supports

Feb 12, 2009 | Gateway PC Desktops

1 Answer

1111111111111111111111111111111111111111


THE BATTERY FOR THE CMOS IS PROBILY THE PROBLEM 3-6V BATTERY PACK PLUG IN OR OPEN THE CASE ROUND DISC SHAPE SILVE IN COLOR SHINNY + PLUS SIGN ON ONE SIDE WITH NUMBERS AND OTHER SIDE MY BE BLANK,

BATTERY PACK BAY AT ANY COMPUTER STORE RED BLACK WIRE WITH PLUG ON ONE END AND THE OTHER END WILL HAVE BATTERY.

ON THE MOTHERBOARD WILL HAVE A 2-3 JUMPER ON IT IT MY SAY BATT. 1 HOT,
2 GROUND, 3 GROUND.

ALL MOTHERBOARDS ARE DIFFERENT

IF YOU KNOW THE MANUFACTURE THAN GO ON LINE AND TYPE IN MOTHERBAORD MANIFACTURES NAME AND FIND THE NAME OF ALL MOTHERBAORD MANUFACTURE LISTED AND THERE WEB SITES FOR MORE INFORMATIUON.

ROD

Jan 23, 2009 | Compaq Presario 5000 PC Desktop

1 Answer

Red light flashing on power button (2)


I just tried the link again and it worked fine. Let me walk you through the links I clicked to get there: Goto -> http://www.hp.com/ Click Support & Troubleshooting Enter Presario 5000 in the Select a task and enter a product name/number section and make sure See support and troubleshooting information is checked. Click your model (Any Presario 5000 should do. I chose the Compaq Presario S5000T Desktop PC). Click on Solve a problem. Click on Boot-up / power / port issues. Click on Troubleshooting Power Supply Issues. And there you go.

Sep 26, 2006 | Compaq Presario 5000 PC Desktop

Not finding what you are looking for?
PC Desktops Logo

Related Topics:

615 people viewed this question

Ask a Question

Usually answered in minutes!

Top PC Desktops Experts

joecoolvette
joecoolvette

Level 3 Expert

5660 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18299 Answers

Are you a PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...