Changed RAM, Mainboard, Video Card; No POST

July 27, 2011 at 06:03:08
Specs: Windows Vista, AMD Phenom 9500/ 4GB (4x1) DDR2 667Mhz
Hey Everyone!

I was given a desktop computer; HP A6000. Apparently the computer does not boot up normally.

The first symptom was a constant BIOS beeping sound. Suspected RAM issue. Removed all four modules and also removed the Graphic Card (old) and then powered the computer; beeping sound present (seems as the Mainboard was working)

Reinstalled just one RAM (old) module and reinstalled the Graphic Card (old). Powered the computer; BIOS beeping sound still present.

Suspected Video Card... Removed the Video Card (old) from the Mainboard and installed a 16X PCI Express - ASUS 256MB (before installing,checked to see whether the board can support such graphic by contacting HP; Mainboard supports Video Card).

Powered the computer; BIOS sound still present (despite having each RAM (old) module tested "one by one"). Removed all RAM modules and then installed a (new) DDR2 667Mhz (1GB).

Powered the computer; BIOS beeping sound still present. Concluded that the Mainboard is the likely cause of the problem since the Video Card and RAM have been replaced (also disconnected all PCI Cards, HDD, Floppy and DVD ROM).

Sourced a new Mainboard (I sourced the exact model of the "faulty" mainboard). Installed new Mainboard with just one RAM Module (NEW RAM), ASUS Graphic Card (not the original one that was installed on the old board), left all SATA (DATA) cables disconnected and then powered the computer.

This time there was no BIOS beeping sound. However, no POST on the screen. Checked to see if the LCD monitor is working by connecting it to another computer; LCD is in a working condition.

Removed all RAM modules and Video Card (only left the CPU with HSF and PSU Power Connections connected).

Powered the computer; no BIOS beeping sound. This is the strange part. Suspected CPU which might be the cause of it (had the motherboard replaced twice as I thought the first one which I ordered was faulty).

Would anyone know if it is a good idea to have the CPU changed?


See More: Changed RAM, Mainboard, Video Card; No POST

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#1
July 27, 2011 at 06:05:37
My apologies... The specifications of the system are as follow:

Processor: AMD Phenom 9500

RAM: 4GB (4 x 1) DDR2 667Mhz

Model of Computer: Desktop HP A6460A


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#2
July 27, 2011 at 08:01:48
BIOS Beep Codes
http://h10025.www1.hp.com/ewfrf/wc/...

"This document pertains to HP and Compaq Desktop computers."

"What to do when beep codes occur"

(troubleshooting)

The only bios brand I know of that produces a continuous beep or a continuous beep pattern is an Award bios, or a brand name bios version based on an Award bios.

"Beep codes for Award bios

Most Award post codes are displayed to screen. If a beep code occurs the problem is likely occurring before the system can display video (check the video card or memory).
NOTE: The following codes can vary depending on BIOS version.

Beeps Description
1 short beep - POST process completed successfully - normal startup
1 long beep followed by 2 or 3 short beeps - Unable to initialize video (to display the post code)
Continuous beeping without pause - Serious system related issue such as CPU overheating
Other beep conditions - Memory errors."

In my own experience.....

....a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

Which were you hearing - the never ending beep or the continuous beep pattern ?

If there is nothing else wrong, when you remove all the ram, you get no video but you hear the beep pattern.

If you're hearing a continuous beep that never stops, then, since you have changed mboards, assuming there's nothing wrong with that, if the CPU model is one supported by the mboard's bios version, I suspect the CPU is damaged.
You can't tell whether it is damaged by looking at it, unless it's been physically damaged from overheating.
Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...
.........

"Sourced a new Mainboard (I sourced the exact model of the "faulty" mainboard). Installed new Mainboard with just one RAM Module (NEW RAM), ASUS Graphic Card (not the original one that was installed on the old board), left all SATA (DATA) cables disconnected and then powered the computer.

This time there was no BIOS beeping sound. However, no POST on the screen. Checked to see if the LCD monitor is working by connecting it to another computer; LCD is in a working condition.

Removed all RAM modules and Video Card (only left the CPU with HSF and PSU Power Connections connected).

Powered the computer; no BIOS beeping sound. This is the strange part. "

Your A6000 series computer, if it still has it's original PS, probably has a 300 watt capacity PS.

Which Asus PCI-E X16 card did you install ?

If the video chipset on that video card requires a recommended minimum PS capacity of a lot more than 300 watts (e.g. more than 350 watts) , or if the particular PS model can't supply enough current (A; Amps) at +12v that the video chipset requires, then either
- the computer will not boot at all, the PS MAY have been damaged
- or - it does boot but the PS is being constantly overloaded and it WILL be damaged, sooner or later .

Some PCI-E X16 cards have one or two 6 or 8 "pin" power sockets that each must have a single connector, or a matched pair of connectors in the same wiring bundle, from the power supply plugged into
Does it have one or two of those; if so, did you plug in connectors from the power supply into it/them ?
NOTE
- that if it has that, you must fill the socket(s).
- if the card has two power sockets, if the PS does not have enough suitable connectors, using a Y cable from one connector on the PS wiring to two of the same will NOT provide enough current to the card. A Y wiring adapter that is two female molex power connectors to a 6 pin connector WILL provide enough current, if the PS has enough capacity. .
....

Apparently at least some of the mboards for the A6000 series have onboard video.

If the mboard has onboard video....

Remove the AC power to the case, remove the PCI-E X16 card, connect the monitor to the onboard video port, install at least one of the original ram modules, restore AC power, try booting the computer.

If you haven't fried the PS by installing the PCI-E X16 card, you will probably have the same situation regarding a beep or beeps that you had previously.



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#3
July 27, 2011 at 08:18:14
With the old motherboard, did you check the manual about the beeps? The number of beeps and their duration can give a clue to the problem, although it's usually ram or video.

You might want to remove the motherboard from the case and try it out, just to make sure there wasn't a problem with the installation. Check that the cpu and its heatsink and fan are installed correctly. It's hard to tell if the cpu is bad but the beep code from the old motherboard might tell you something.

It might be the power supply but usually if you at least get beeps then the PSU is OK. Often a bad power supply will ruin the motherboard as well so hopefully that's not it but uf you have a working compatible power supply you might want to swap it in. I wouldn't recommend just yet spending a lot of money on a new power supply. See how the above suggestions work out first.


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Related Solutions

#4
July 27, 2011 at 08:40:05
"Model of Computer: Desktop HP A6460A"

Thats certainly NOT A6000.
HP (US) lists 30 models in the A6000 series.
Some are A6000 followed by one ot two letters, some are A6xxx models.

"Processor: AMD Phenom 9500 "

Apparently that's what it came with.

HP Australia
(an Asia-Pacific model - NOT a US model)
HP Pavilion a6460a Desktop PC
http://h10025.www1.hp.com/ewfrf/wc/...

HP Pavilion a6460a Desktop PC Product Specifications
http://h10025.www1.hp.com/ewfrf/wc/...

Excerpts...

Processor
AMD Phenom X4 9500


Memory Upgrade Information

•Dual channel memory architecture
•Four 240-pin DDR2 DIMM sockets
•Supported DIMM types:
◦PC2-5300 (667 MHz)
◦PC2-6400 (800 MHz)
•Non-ECC memory only, unbuffered
•Supports 2GB DDR2 DIMMs
•Supports up to 8 GB on 64 bit PCs
•Supports up to 4 GB* on 32 bit PCs
◦32 bit PCs cannot address a full 4.0 GB of memory

Power Supply - 300 watts - confirmed

Motherboard Specifications, MCP61PM-HM (Nettle3)
http://h10025.www1.hp.com/ewfrf/wc/...

Excerpts...

•Manufacturer's motherboard name: ECS MCP61PM-HM
•HP/Compaq name: Nettle3-GL8E


Video
Integrated graphics using nVidia GeForce 6150se
*Integrated video is not available if a graphics card is installed.
•Integrated graphics using nVidia GeForce 6150SE
•Also supports PCI Express x16 graphics cards*

NOTE that it also specfies you can use a CPU that draws up tp 95 watts - some AMD cpus draw 125 watts, or more, and this mboard may be damaged if one of those is installed . That was a problem with some AM2+ mboards.
.....


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#5
July 27, 2011 at 12:20:57
By the way......

If you have access to another computer with a PCI-E X16 slot that has enough PS capacity for the video chipset on the card (at least 300 watts) , try the original video card with that computer.
....

In most cases there is nothing wrong with the original ram !

It's extremely RARE for ram that worked fine previously in the same mboard to go "BAD", and it's many times more rare for more than one ram module at a time to go "BAD" at the same time,
unless the ram has been damaged by an external event, such as a power spike or surge, a nearby ightning strike or a lightniing strike on the AC power grid, a static electricity discharge, a power supply while it was failing,
- or - by the user doing something dumb, such as plugging in or unplugging the ram while the PS still has live AC power to it, or installing a ram module backwards in a ram slot and then attempting to boot the computer, which instantly fries the backwards ram module and the ram slot circuits of the slot it was backwards in, and the mboard will NOT boot normally, unless, (this might work) the damaged ram slot has been cleaned of all it's black carbon deposits and melted plastic that bridges contacts in the slot.

However,

- it IS relatively common for the ram to develop a poor connection in one or more slots, or for someone to not have installed the ram so that it's NOT seated properly. You may or may not get any mboard beeps when that happens.

- ram module compatiblity
-not all ram that you might think should work in your mboard will work in it properly.
In your case it has to be compatible with the memory controller in the AMD cpu.
If the cpu is not working correctly, the ram cannot work correctly.
Also, especially for DDR2 PC-6400 (800mhz) ram and above, the ram modules don't necessary use the standard JEDEC ram voltage - if you mix modules that different voltages are specified for in their SPD chip that the bios reads by default , you are likely to have ram problems, especially in the operating system itself.


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#6
July 31, 2011 at 04:59:18
Hey Everyone!!

Thank you for the awesome answers!!

Just an update... this time, I have sourced another motherboard (same board). Installed a compatible RAM, changed the CPU (AMD X2 255); connected "just" the basic components (No HDD, DVD ROM, Floppy, Graphic Card (PCI))

Powered the computer; same problem (no POST). However, there is no constant BIOS beeping sound. Any ideas?


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#7
July 31, 2011 at 08:58:08
"I have sourced another motherboard (same board). Installed a compatible RAM, changed the CPU (AMD X2 255); connected "just" the basic components (No HDD, DVD ROM, Floppy, Graphic Card (PCI))"

There is probably nothing wrong with your first replacement mboard.

Hard drives, optical drives, and the floppy drive use very little power.
Connecting them will not cause the mboard to not boot unless it's the extremely rare case that their circuit board or their connection is shorted.

The mboard has onboard video. Are you connecting a monitor to that or to a PCI video card in a mboard slot ?

There is probably nothing wrong with the original ram if the computer worked fine previously when it was installed. If you know which module(s) that (those) are, install one or all of those.

People often think ram that was NOT previously installed in the mboard is compatible with it, but sometimes it is NOT !
In the worst cases of ram incompatibility, the mboard will NOT boot, and you usually hear NO mboard beeps at all !
In this case the memory controller is built into the AMD cpu, NOT the main chipset on the mboard. If the cpu is damaged or if the mboard's bios does not recognize the cpu type, the ram cannot work !

If you're not sure whether the ram that was originally installed is compatible or has been damaged, and to rule out ram that did not come with the mboard being incompatible, if you remove all the ram, if there is nothing else wrong, and if a connection is hooked up so you can hear mboard beeps, when you boot the computer you will have no video but you will hear the beep pattern that indicates no ram installed or a ram problem

In my own experience.....

....a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.
..........

HP Pavilion a6460a Desktop PC Product Specifications
http://h10025.www1.hp.com/ewfrf/wc/...

Excerpts:

Processor upgrade information

Socket type: AM2+
Motherboard supports the following processor upgrades:
•Phenom with Quad Core (Agena) technology (AM2+) up to 9600 (up to 95 watt TDP)
•Athlon64 X2 with Dual Core technology up to 5600+ (up to 89 watt TDP)
•Athlon64 less than 4000+
•Sempron less than 3800+
....

"changed the CPU (AMD X2 255) "

You're introducing an unknown factor.

That cpu is probably much newer than all of the cpus listed.

HP has no list of CPUs that are supported by the mboard like retail mboard models usually do on the mboard manufacturer's web site.

HP has minimal if any info in release notes about whether any possible bios updates support which newer CPUs

If the bios version the mboard has cannot recognize the cpu type, the mboard may not boot at all, or it may boot but the bios will have set the cpu to fail safe settings.

Or - there may be another reason why the CPU can't be used with your mboard.
..........

I'm assuming that you have made sure you have your wiring from the PS connected properly. E.g. you must plug into the 24 pin power socket and fill it, and you must plug in a 4 pin connector into the power socket near the cpu socket.


Depending on which Asus PCI-E X16 card you installed previously, which have have not specified, you may have damaged the power supply.

Try connecting a different power supply if you can, preferably at least 300 watts capacity for the mboard with no video card installed in a slot..
..........


AMD Athlon II X2 255 Dual Core 3.1GHz Processor Review
http://www.legitreviews.com/article...

Excerpts:

"The AMD Athlon II X2 255 is the latest dual core Athlon II to be released. Based on the Regor core, the Athlon II X2 255 has a clock speed of 3.1GHz with a 2000MHz HT link and memory support for both DDR2 (up to 1,066 MT/s) and DDR3 (up to 1,333 MT/s). "

There is no supported cpu type listed for this mboard that has a II in the model name.

"....comes in at a cool 65W max TDP..."

No cpu listed for this mboard draws more than ~95 watts, so this mboard is probably one of the early AM2+ models that cannot support using a cpu that draws more than that without damaging something on the mboard.
65 watts is well below that.


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