Question about Compaq Presario 5716 PC Desktop

2 Answers

Installing new MB in old case

Will it hurt to install a new MB in an old case where I can't use the new MB support plate? The old MB mounted right to the case.

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  • blcos Feb 08, 2010

    You are correct; "It is an integral part of the computer case's metal framework. It is riveted to the metal framework, 'Ribcage'. The Support Plate has 'Bumps' formed into it, that act as Standoff's, or Spacers, and keep the motherboard off of the Support Plate itself. I'm going to assume that I will probable not be able to use these bumps and will have to flatten them out and drill new holes for mounting the new MB. I also have a 1998 Gateway case that is very similar that I may use. I wasn't sure if the interior metal frame was an actual support plate or consider part of the interior case. So thank you for clarifying that for me. I'm just now starting to figure out my possible components and wanted to see if it would be possible to use an old case first. I have no problem drilling or grinding the case itself; I have the tools to do these things. Thanks again for the help and sorry about the confusion.

  • joecoolvette
    joecoolvette May 11, 2010

    I thought about that blcos, when I provided a solution for you, on how to find what motherboard will fit. My solution's premise, was designed with the fact that you were aware that a modification, or modifications, MAY be necessary to install the motherboard you had in mind. Something I do with older computers all of the time, if necessary. [Fit into the computer case itself was the premise, not necessarily fit onto the existing Support Plate. The Support Plate used is a Proprietary item from a Proprietary computer manufacturer. They want THEIR parts used in THEIR line of computers. This can be readily seen by the motherboard itself] After seeing your problem stated now, and looking back at the solution I provided you, I see my failing. I apologize, and would like to rectify the matter. To do so, may require extensive modification/s to the existing Support Plate of the Presario 5716.Or modifications to the I/O Shield, and additional use of brass Standoff's. Both will require tools, patience, and have a safety issue involved due to sharp edges. I will also need to communicate with you, through my adding comments as Clarifications, and you responding through Comments. Do you wish to proceed? (The Compaq Presario 5716 does indeed have a Support Plate. It is an integral part of the computer case's metal framework. It is riveted to the metal framework, or spot welded to the metal framework, 'Ribcage'. The Support Plate has 'Bumps' formed into it, that act as Standoff's, or Spacers, and keep the motherboard off of the Support Plate itself. This keeps the solder joints, on the bottom of the motherboard from touching the Support Plate. If they touch, two or more solder joints may have a connection created in-between them, and this would short out the motherboard. {Short Circuit. Could fry the motherboard's components, as well as the Processor, Ram Memory, Harddrive, and Graphics card, if used} The 'Bumps' also raise the motherboard away from the Support Plate, so that air can flow underneath. Helps to keep the installed hardware components cool)

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Thank you blcos, I appreciate that.
I didn't know what level of tech/fabricator you are, and I now see you are very competent.

My two-fold proposed solution is,

A) IF, the Support Plate you have for the motherboard you have on hand, is too small in area to just rivet it to the existing metal 'Ribcage' metal frame work,

1) Cut the inner part of the existing Support Plate/Framework, so that there is a large rectangular hole in the center, leaving a 'Frame' around the edge.

The 'frame' being approximately 1 inch wide, or whatever is compatible.
(Would resemble a picture frame when done)
Leaving enough area for the new Support Plate to rivet to it.
(Pop rivet)

A minor, (Major?) problem is that the existing Support Plate would have to be removed from the 'Ribcage' frame work, in order to cut a rectangular hole in the center.

(Unless you have a large hole made, and use a metal nibbler cutter.
Example: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96661 )

The rivets would be drilled out, with pop rivets to reinstall.

The brass standoff's, or plastic spacers would have to be the right height, in order for the I/O ports on the motherboard to line up with the holes in the I/O Shield.
Or modifications made to them, or the I/O Shield.

The I/O Shield not only keeps dust out, and helps form a tighter seal for air flow inside the computer case, but also is a Radio Frequency interference shield.

B) Proposal 2 was to use the existing Support Plate, and mount the new Support Plate on top, with modifications to the 'Bumps' on the old Support Plate, and to the I/O Shield, and spacers used.
(Plastic spacers, or metal brass standoff's)

As you stated, flatten the Bumps down

The I/O Shield may have to have one side reduced, (Outside case edge), so that the I/O ports will line up with the holes in the I/O Shield.

The extensions, (Spacers or Standoff's), may have to be reduced in height, or substituted with a compatible item that will work, so that the I/O ports line up with the holes in the I/O Shield.

Whatever line of modification you use, I suggest that a gap be created in-between the Support Plate, and Motherboard for air flow, and also to keep the solder joints on the bottom of the motherboard, from touching the Support Plate.

If possible I would like to know how this comes out.

Regards,
joecoolvette



Posted on Feb 09, 2010

Testimonial: "Thanks for the advice. As I stated I'm in the beginning stages and it maybe a while if I go through with it all. Thanks again for your time and input."

  • joecoolvette
    joecoolvette Feb 09, 2010

    I thank you for your rating, and taking the time for an additional comment.

    MOST Appreciated!

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Yes. The brass moutings are to isolate the board so the solder on the back of the board doesnt short out. You do not want to install a board without them.

Posted on Feb 05, 2010

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Having a bit of trouble making the "replacement


1) Definitely WATCH your fingers! Those edges are usually sharp like a razor.

2) Yes, installing an I/O Plate can be as much fun as trying to stuff a greased pig in a plastic bag.

(I/O = Input/Output. The I/O area is where the Input/Output devices are hooked up. The I/O Plate is a shield. I/O Plate is also known a I/O Shield. Normally use to prevent radio interference. Just computer trivia for the day brought to you by your friendly expert moderator, joecoolvette)

It helps to have a small file to dress the edges of the computer case 'ribcage' where the I/O Shield mounts. Little burrs, and sharp edges can deter the mounting of the shield.

The 'fingers', or clamp-like thingies can also be a pain.
I start with trying to ease one corner in just a little at an angle, then the side, then the top and bottom, and use the back of a screwdriver to make the I/O Shield 'pop' in place.

Let me back up a moment here after rereading your post.

The 'clamp-like thingies' that you are referring to I now get.

These 'extensions' are used for the I/O Shield to make a good contact to the various ports.

The I/O Shield is supposed to be installed before installing the motherboard, Donna_Thue.

Remove the motherboard, then try installing the I/O Shield.

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