Question about PC Chips M848ALU Motherboard

3 Answers

PC Chips M848A dead, no screen output or blips

I tried to replace my older main+CPU combo with a M848A bundled with a
2000 Sempron. I did all the connections carefully without any power and took all the common precautions.

When I power up, the system seems completely dead. All the fans work, the HDDs spin, the leds are on, but the BIOS first screen etc does not appear at all, the screen remains BLACK and no blip is sounding. I tested RAMs and CPU on another mainB, and are alive, so my suspicion is drawn to the M848A board.

Is the mainboard irrevocally dead, or there is some hope?

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  • deadjune Dec 28, 2008

    Could it be that the RAM does not work with this board?
    Will it show POST, in this case?


  • Anonymous May 25, 2009

    its 2009 and same problem.. swapped ram and video cpu = no go.

  • islechik May 11, 2010



    Solution #2posted on Jan 15, 2009





    unclouded

    Rank: Apprentice
    Rating: 92%, 2 votes

    This works with a caveat. Instead of reefing down in the centre of the stick - we took the other side of the case off and supported it from that side while firmly seating the RAM.

    I was lucky to come across this within 5 mins of Googling, my husband was thinking that I managed to toast a brand new stick of RAM or the slot somehow.

    Thanks - that was really helpful



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I had the same problem. I bought the M848A from Newegg in an attempt to save my trusty Athlon 2600+ CPU and a fancy Raedon 512mb AGP card which I salvaged out of my old broken down system. I thought it would be a good time to update the RAM so I bought 2 gigs of OCZ 3200 DDR400 to go with.

Problems:
(1) First the damn thing wouldn't boot past the post screen. It would simply cycle thru post over and over. Fixed: The microsoft XPpro operating system was corrupt. The new board hated the old configs from the previous system. After trying (and failing) a os repair, I ended up simply doing a clean intall with great results. Board was stable worked great for a week. Only had one glitch...

(2) The board would only recognize and post ONE of the 2 gigs of ram I bought. I raided all the CMOS settings, and downloaded all the user manuals I could get a hold of and found no answers to this curious problem. On a whim, I opened the case and switched their locations back and forth which led me to...

(3) Lights on, no one home. All the lights came on... power, HDD, cd drives... all the fans worked: case, CPU, graphics card... but the screen would remain blank/unpowered and no post menu would come up. Seemed like it wanted to work, but simply stopped short of booting up. THIS WAS YOUR PROBLEM?!?? On a hunch, (more an angry impulse) I reached over and popped an old Mushkin Technologies (PC 3200 400DDR) 512mb out of my old dead mobo and slammed it solo in the primary memory slot. Bingo. Fired right up.

The board appears to be testy with its RAM... If it fails its initial memory test, it will not post. The screen will not come on. I'm not 100% certain this is the final solution to the problem... I'm still playing with it. My questions now are.... do I have dead RAM? Chip compatibility issues? Perhaps the PC Chips support techs on their website have some practical advice on this issue. I'll keep you posted if you like.

Posted on Jan 15, 2009

  • unclouded Jan 15, 2009

    OK, I've figured out what the problem with the RAM issue is. Your RAM is not bad, it is simply installed incorrectly. Bear with me.



    If you are like me you were very careful about inserting the RAM gently but firmly by pressing on its corners until you could snap the retaining clips in place. Ordinarily, this is a good technique. Not so in this case.



    Here is what I found:



    The M848A board is structurally weak and is FLEXING underneath the installed RAM. The corners are in tightly and clipped in place, but the board bows out just far enough in the middle of the RAM, so that the center pins aren't making contact. Result? No RAM found... no post. Try reinstalling the RAM this time pressing VERY firmly in the center. Use your thumb and press very firmly all along the length of the card. Jiggle them as you push, if necessary. They are a tight fit, you will feel them settle in ever so slightly.



    Lets recap my results:



    (1) First, Carefully installed a duo of 1 gig RAM. One posted, the other did not.



    (2) Then, I switched them. Carefully installing them in reverse order. Neither posted.



    (3) Then I got angry, and rammed a solo 512 mb RAM in the primary slot. Instant post.



    (4) I then tried a duo of 512mb I had laying about. Again carefully installed. Again no post.



    (5) In the end, I put my face right in the case and examined the whole board with a flashlight. That's when I noticed the RAM connectors were bowed ever so slightly away from the cards in the middle. not very much at all, but apparently, enough to make all the difference. Sadly, my great technical solution was poking them harder and harder with my thumb until I felt them seat properly. Then they posted.



    (6) In the end, I yanked the 512's and reinstalled the two 1 gig cards. The system posts with no probs and they both work fine.



    Cheers, Unclouded.

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You need to reset bios with the jumper on the mainboard

Posted on Jan 11, 2009

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Socket A board, either the cpu is dead or the motherboard cpu socket, i suspect the motherboard.
compdoctor2005@btinternet.com

Posted on Dec 27, 2008

  • Chris Fell
    Chris Fell Dec 29, 2008

    No it will be the motherboard cpu socket.

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My amd sempron 2800+ 2ghz working now on 1,20 ghz m848a v5.0


Your Sempron 2800+ is working at 1.20GHz?

Let me state this;
The MAXIMUM operating frequency rate ('Speed') is 2.0GHz
This is when the Processor is operating at a Maximum 'speed'.
If it isn't under a full load, it won't be operating at a maximum 'speed'.

Again, if there is no program/application running that demands the full capability of the Processor, the Processor will be idling along.

[A Processor operates at a Frequency Rate. For folks to understand it better it is stated as 'Speed'
GHz stands for GigaHertz.
Giga is approximately 1 Billion
Hertz stands for Cycles per Second.

The maximum frequency rate for the Sempron 2800+, is 2.0 Billion Cycles per Second ]


An AMD processor is 'Double-Pumped'. (In comparison an Intel processor is 'Quad-Pumped' )

http://en.wikipedia.org/wiki/Double-pumped

The 333MHz FSB is actually 166Mhz that is 'double-pumped'

http://en.wikipedia.org/wiki/List_of_AMD_Sempron_microprocessors#.22Thoroughbred-B.22_.28Socket_A.2C_130_nm.2C_Model_8.29

I don't know which Sempron 2800+ you have.
Thoroughbred- B Core, or Thorton Core.

{Thoroughbred-B Core model has SDA2800DUT3D part number on the top of the Processor's case.
Thorton Core model has SDC2800DUT3D part number on the top of the Processor's case}

Both models fit in a Socket 462 processor socket. (Socket A is also known as Socket 462)
Both models have a 333MegaHertz Front Side Bus. (333MHz FSB)

Both models have a Multiplier of 10 times.
(Under the heading - Mult 1, is10X )

Voltage is 1.60 volts.



PC Chips Support > M848A(V5.0) motherboard,

http://www.pcchipsusa.com/PCCWebSite/Products/ProductsDetail.aspx?detailid=341&CategoryID=1&DetailName=Manual&MenuID=7&LanID=2

Under the Downloads heading to the right, left-click on the Manual tab.
Now click on the country nearest yours, ( Taiwan, USA, Europe, China )

This motherboard manual is a PDF file. At the top of the PDF file is the page number box. It is to the Right of the Down Arrow.
Use the Down Arrow, go to Page 39.

In BIOS Setup I want you to go to the sub-menu -
Advanced Chipset Setup.

[When you start your computer, and before Windows loads, there is a manufacturer logo screen.
Right after the logo screen, and at the bottom of the screen, is stated on how to Enter BIOS Setup.
It will state, Hit if you want to run SETUP.

At this time you are supposed to press the DELete key to enter the BIOS Setup Utility.
(Full name for BIOS Setup)

The window of opportunity is usually VERY small. If you do not press the Delete key in time, Windows will load.

I suggest, that AS SOON as you press the Power On button to start your computer, start tapping on the Delete key in 2 second intervals.
This way you won't go past the window of opportunity.

(If you hear a beep each time you tap the Delete key, don't sweat it. It is a Stuck Key Error beep)

Go to Page 35 in the motherboard manual. This shows you the Main Menu for the BIOS Setup Utility.
In the list is Advanced Chipset Setup.
You can no longer use your mouse. In the BIOS Setup Utility you have to use the Keyboard to navigate around.

Use the Down Arrow key to highlight Advanced Chipset Setup.
Press the Enter key ]

In Advanced Chipset Setup the top line is - Detect CPU Frequency
To the right should be - Auto

The second line down is CPU Frequency. (Processor frequency)
For your processor it should state 166MHz.

At the Right side is the Available Options, and at the bottom is the navigation key.
(Available options shows you what options are available for what you are looking at.
The Navigation Key tells you how to navigate around, and how to change settings)

[Using CPU-Z from CPUID.com? This is good for looking around, but the BIOS Setup Utility can change parameters, unlike CPU-Z ]

1) Is the Detect CPU Frequency set to Auto?
2) Is the CPU Frequency set to 166MHz?

If so everything is working fine.

If not state so in a Comment, and I'll guide you in setting CPU parameters manually.

(NOTE*
When you are looking around in BIOS Setup, it is - Just That.
You are looking around, and have made no changes.

IF you make a change, you have to Save Changes.
Otherwise it will be as if you have done NOTHING at all.

IF you make a mistake in making changes, the computer will not work.
People fear this.
ALL you have to do is go back to BIOS Setup, and set everything back to the way it was, then Save Changes.
The computer will be as it was originally, and will work again.

BEFORE you make changes, write down the original settings )

Also:
A Sempron processor is a Budget processor. Also known as a Starter processor.
It is the bottom of the line. (Just like an Intel Celeron)

A Sempron processor has half of the Cache that a comparable Athlon processor has.

Cache:
The first memory area that the Processor accesses.
The Cache operates at the same frequency rate as the processor does.
It is a small memory area for the Processor.
The more cache you have, the faster the Processor will operate.

The Cache is the first memory area that the Processor accesses, then the Ram Memory, then the Harddrive.

{Ram Memory usually operates at HALF of the frequency rate that the Processor does.
A Harddrive is a mechanical device, and operates MUCH slower than Ram Memory.
Even the solid state Harddrive's}

CPU Support for the PC Chips M848A(v5.0) { M848A version 5},

http://www.pcchipsusa.com/PCCWebSite/Support/CPU_Support.aspx?CategoryID=1&MenuID=69&LanID=2

To the top left of the page is a red rectangle with the heading CPU Support Search in white.

1) Left-click on the blue down arrow, on the right side of the box under - Product Category.
In the list click on - Motherboard

2) There is another box underneath. Left-click on the blue down arrow to the right of this box.
Click on - Socket 462 (AMD.....

3) Left-click on the blue down arrow for the box under - Model
Scroll the list down, click on M848A
{V5.0 will pop-up in the box under Version}

4) Left-click on Submit

You are now looking at the AMD processors, that the PC Chips M848A(V5.0) motherboard will support.

{Where it states Status on the right.
This tells you whether the Processor will work with the current BIOS program, and version, that is on the computer now.

Your BIOS program was made by AMI
American Megatrends Incorporated.
It was made in 2001.
The version is 1.54.B1E

Under the Status heading you will see YES listed for all processors that are listed.
If there were a NO to the right of a processor, it means the current BIOS program would not work with it.
You would then need to upgrade the BIOS program.

Just thought you may want to know }

Why do I bring up CPU Support?
Because I would fly that 'Sempy' processor out the door like a Frisbee at the neighborhood cat.
Just sayin'.

http://www.weirdstuff.com/cgi-bin/item/13161

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 17, 2011 | PC Chips M848A V5.0 Socket A and FSB400...

1 Answer

PC will not boot up, tried replacing the psu, unpluging the hard drive & 7-1 card reader. The pc then makes a 8 beep sound before repeating itself. Mother board is a pc chips m848a


Beep codes are vary depends on the BIOS manufacturer, when ever your computer beep more than once this mean it has an hardware problem. To determine the problem you need to check the memory, if these is another empty memory slot take the memory from its present slot and put it in the empty slot always make sure the memory fit firmly in the slot .If you still hear the beep you can replace the memory,you can replace the video card if the problem still exist you should try another CPU because the present one may be faulty and finally if the problem still exist this mean the memory slot is faulty and the only way to fix this is to replace the motherboard.

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The MB you mention does not support SATA it has noSATA connectors

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becose the processor not support that.replace it by a suitable one.

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Memory +cpu upgrade


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PC Chips M848A Motherboard


Try clearing the bios/cmos using the jumper on the board, page 10 in you're manual. Than try booting. See if you're keyboard allows you to get into the bios/cmos. I'm guessing you tried another keyboard? You can also buy a PS2 - to -USB Y adapter. This is what one looks like.
http://www.cablestogo.com/product.asp?cat%5fid=104&sku=27225
If you bought an AGP graphics card lately you might have also received a single PS2 to USB adapter free. Like this one.
http://www.cablestogo.com/product.asp?cat%5fid=104&sku=35700
It's not uncommon for the the lights to function & yet the keyboard not function. A single pin within the PS2 on the keyboard could be bent or bad or not seating correctly in you're new board.

Mike

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1 Answer

Dead Mobo?


Do you have both power connectors from the PSU hooked up?

You need both the large one near the ram, and the smaller square 4-pin one near the printer port

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