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No beep, no display, tested power supply and comp. monitor, tested RAM and graphics- no probs.. new proccesor and motherboard still nothing...

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Hi,
Causes for no display are :
1. SMPS : Most likely, replace
2. RAM : Most likely, replace
3. Motherboard : likely if it is old
4. Processor : unlikely if it is Intel
5. Graphics Card : Try on board graphics
Thanks
Bhaskar

Posted on Jun 04, 2008

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Beep Codes (Different BIOS) " What they mean "


Standard Original IBM POST Error Codes

Code Description

1 short beep System is OK
2 short beeps POST Error - error code shown on screen No beep Power supply or system board problem Continuous beep Power supply, system board, or keyboard problem Repeating short beeps Power supply or system board problem
1 long, 1 short beep System board problem
1 long, 2 short beeps Display adapter problem (MDA, CGA)
1 long, 3 short beeps Display adapter problem (EGA)
3 long beeps 3270 keyboard card


IBM POST Diagnostic Code Descriptions
Code Description

100 - 199 System Board
200 - 299 Memory
300 - 399 Keyboard
400 - 499 Monochrome Display
500 - 599 Colour/Graphics Display
600 - 699 Floppy-disk drive and/or Adapter
700 - 799 Math Coprocessor
900 - 999 Parallel Printer Port
1000 - 1099 Alternate Printer Adapter
1100 - 1299 Asynchronous Communication Device, Adapter, or Port
1300 - 1399 Game Port
1400 - 1499 Colour/Graphics Printer
1500 - 1599 Synchronous Communication Device, Adapter, or Port
1700 - 1799 Hard Drive and/or Adapter
1800 - 1899 Expansion Unit (XT)
2000 - 2199 Bisynchronous Communication Adapter
2400 - 2599 EGA system-board Video (MCA)
3000 - 3199 LAN Adapter
4800 - 4999 Internal Modem
7000 - 7099 Phoenix BIOS Chips
7300 - 7399 3.5" Disk Drive
8900 - 8999 MIDI Adapter
11200 - 11299 SCSI Adapter
21000 - 21099 SCSI Fixed Disk and Controller
21500 - 21599 SCSI CD-ROM System

AMI BIOS Beep Codes
Code Description

1 Short Beep System OK
2 Short Beeps Parity error in the first 64 KB of memory
3 Short Beeps Memory failure in the first 64 KB
4 Short Beeps Memory failure in the first 64 KB Operational of memory
or Timer 1 on the motherboard is not functioning
5 Short Beeps The CPU on the motherboard generated an error
6 Short Beeps The keyboard controller may be bad. The BIOS cannot switch to protected mode
7 Short Beeps The CPU generated an exception interrupt
8 Short Beeps The system video adapter is either missing, or its memory is faulty
9 Short Beeps The ROM checksum value does not match the value encoded in the BIOS
10 Short Beeps The shutdown register for CMOS RAM failed
11 Short Beeps The external cache is faulty
1 Long, 3 Short Beeps Memory Problems
1 Long, 8 Short Beeps Video Card Problems

Phoenix BIOS Beep Codes
Note - Phoenix BIOS emits three sets of beeps, separated by a brief pause.

Code Description
1-1-3 CMOS read/write failure
1-1-4 ROM BIOS checksum error
1-2-1 Programmable interval timer failure
1-2-2 DMA initialisation failure
1-2-3 DMA page register read/write failure
1-3-1 RAM refresh verification failure
1-3-3 First 64k RAM chip or data line failure
1-3-4 First 64k RAM odd/even logic failure
1-4-1 Address line failure first 64k RAM
1-4-2 Parity failure first 64k RAM
2-_-_ Faulty Memory
3-1-_ Faulty Motherboard
3-2-4 Keyboard controller Test failure
3-3-4 Screen initialisation failure
3-4-1 Screen retrace test failure
3-4-2 Search for video ROM in progress
4-2-1 Timer tick interrupt in progress or failure
4-2-2 Shutdown test in progress or failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 RAM test in progress or failure>ffffh
4-3-2 Faulty Motherboard
4-3-3 Interval timer channel 2 test or failure
4-3-4 Time of Day clock test failure
4-4-1 Serial port test or failure
4-4-2 Parallel port test or failure
4-4-3 Math coprocessor test or failure
Low 1-1-2 System Board select failure
Low 1-1-3 Extended CMOS RAM failure

on Dec 30, 2009 | PC Desktops

2 Answers

No image in monitor


isolate it first. there are 3 steps: step 1: isolate the monitor. use other monitor. if still no display, step 2: replace video card. if still no display, step 3: replace memory module.

Jun 02, 2010 | eMachines C6535 PC Desktop

2 Answers

Dell Inspiron Vostro 530s won't boot.


Hi,

I work for Dell, If the power button led light is flashing amber or amber (the Power supply is faulty) The Yellow light you saw inside the motherboard is the "Flea Light" (that is one way you could check if there is still power on the motherboard). Since the motherboard was replaced there are a few more things to check:

1. Video card (integrated or expansion)
2. Monitor (Make sure it displays self test feature when the cables are removed)
3. Monitor Cables (VGA / DVi)
4. Power Cable on the Monitor (try a different cable)
5. Power Supply (you already checked, but i suspect this is causing the problem)

Hope this helps.

Mar 16, 2010 | PC Desktops

1 Answer

Green light next to power button stays on - no response from computer, totally frozen for up to 12 hrs, then green light goes off, computer suddenly comes on for 5-10 min then freezes again.


Good day sir, hi, You need a thorough check on your PC.
But first try testing the Motherboard, Processor and Memory module.

As this point you need a friend, that knows how to tinker with your PC

Or you may need to do this.

1. memory testing:
Try replacing a new memory ram module on your PC, get the modules out of the memory slot, and let it be tested on another PC. if good,

2. power supply
Test for the power supply box, remove the 20/24 pin power connector from the mainboard and short the green and any black wire, your fan should blow out air.

3. Test for motherboard.
remove all coonections from the motherboard, except the 20/24 pin power connector, and the 12v 4-pin molex power connector, connect the pc speaker or the thumb speaker on the speaker port, connect a keyboard, clear the CMOS, (or remove the battery temporarily), connect the header panel (power switch, reset, power led) place the processor and memory (the tested good one). power on.


You should hear a beep (good) The keyboard will light up the three leds, then a few seconds, the numlock led.

If you hear 1 long and 2 or 3 short beeps, problem with the display section. Reseat any graphics card. test again.

If you hear continous beeps, reseat the memory, if the beeping persist, replace your motherboard.

If you hear nothing? only fan blowing, replace your motherboard.

I can only give you instructions, you need a someone who knows how to service a PC.

Dec 17, 2009 | Compaq Presario 5000 PC Desktop

2 Answers

CPU Problems


What can also give the same symptoms as a doa cpu is bad ram. About the only difference is that you usually get a post code with a cpu problem and absolutley nothing with ram.

About the only way to check a cpu is to swap it out. They are not that expensive compared to a new pc unless you want an excuse to upgrade ;-]

Ram is checked by swapping it out or just removing and checking one stick at a time. Sometimes they just need to be reseated and away it goes.

Also check the power supply. If it has overheated or dired etc nothing will work.

Once you have checked out those three you will know if it is worth fixing or junking.

Sep 11, 2009 | E-Machines eMachines Desktop PC

1 Answer

No beep and No display on my monitor.


Did you swap RAM and CMOS from other PC? Try to swap the Power Supply, and the motherboard as well, make sure that these 5 parts are in good condition, 1. motherboard 2. powersupply 3. memory(ram) 4.Display adapters/onboard VGA 5. Monitor

Jul 06, 2009 | PC Desktops

1 Answer

NO POWER


If you have changed the power unit and the computer is still not powering up, then it is quite likely there is a motherboard fault - probably in the power management circuitry, which expects the power_good signal from the power unit at a precise moment in the boot up process. A fault in the power management circuitry would prevent the computer from beginning its boot-up process.

Do the fans in the power unit come on when the computer is switched on? If they don't - this suggests a power unit problem. If the power unit fans do start working but the computer still doesn't boot, this suggests either a faulty or 'dry' connection (easy checked) or a motherboard fault.

If your computer 'works' but nothing is displayed, try pressing Control+Alt+Delete. If it then boots up it suggests a power unit problem. If not .. we come back to the motherboard again.

A low wattage power unit can cause the problem you describe. Every 128 Mb of Ram needs 4 watts of power. Add more for the motherboard (up to 30 watts..) then the floppy/hard drive/dvd etc .. If the power unit can't supply the necessary wattage, it won't boot. The older 250-300 watt power units aren't suitable for modern computers with XP/Vista. Ideally, you should be looking at 400 watts plus -it will tell you on the power unit.

Though to be honest, it does sound like a motherboard fault.

The only other thing that can cause a computer not to boot up (though it will begin the boot up process) are other faults ... When you switch on does it actually display anything on the screen .. and are there any 'beeps'? 1 beep indicates everything is ok .. 3 short beeps and 1 long beep indicate a memory problem (and the computer won't boot..). 8 beeps indicate a video problem (and nothing will be dislayed on your screen). Same with 9 beeps .. which indicates a bios fault - and the computer won't continue the boot process.

If you have nothing .. no power whatsover ... it comes back to the power unit/mainboard. If you're happy that the new power unit you have put in is ok ... suspect the motherboard. If you have access to any unwanted or 2nd hand motherboard ... connect that. If your computer boots up ... its the original motherboard at fault.

Alternatively, rather than replace bits and pieces at random to cure the fault, take your computer along to a computer shop. It will take them minutes to test it for you and identify the fault.

May 17, 2009 | Gateway GT4010 (RBGT4010) PC Desktop

1 Answer

MSI K9N6GM MotherBoard Install


u can try resetting the bios, and check 1gb ram, if that dont work, that it could most likely by ur power supply, wayyyy too low man, u'll mess up EVERYTHING if u continue on that. hope this works, peace!

Jul 18, 2008 | PC Desktops

1 Answer

Aspire? T180


If the PC does not to any beep then usually is a problem with the motherboard.

If the PC does a certain number of beeps on startup, then tell me how many beeps to troubleshoot the problem.

If the computer does single beep on startup as usual, then may be the monitor, monitor cable or graphic adapter.

Simple thing that you can do it yourself is disconnecting computer power cable from power outlet for 15 -12 mins. ac connect it back, this will solve troubles caused by electrostatic charges.
Also check video cable connections to monitor.
If you have another computer also test the monitor on other computer.
If the main unit is not booting (CD drives and internal fans often start up even if the Motherboard is blown). Then yo need to open the pc and test component inside.
If you have practice in fixing hardware you can start removing RAM modules and testing them, then buy a tester board for the MB and do a diagnostic test on motherboard.
Other options are taking PC to service or getting a new PC.
If the PC is still under guarantee, then contact Acer to validate your guarantee and get the machine to an authorised service centre.

Regards

Mar 16, 2008 | Acer Aspireā„¢ T180 PC Desktop

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