New PS won't fit old screw hole placement

Working on a Compaq EVO d510 CMT, CD-RWdrive, zip drive, mobo, onboard video card, onboard sound card , P4, 2.0Ghz CPU -typical older machine.....factory specs. Nothing new or special added by him.

Adding new hard drive (120GB)as Master, along side old 40GB as slave, have to replace PS, and calculated new requir. to be 301-305 (from adecy.com) and went out, got a 350 TruePower - Wham ! The screw holes are entirely wrong. The 'box' is thinner than the opening as well. (Where did industry standards go ?) Leaves a 1/2 inch gap between bottom of PS & 'outdoors' before case-back resumes. Can only get one screw in and the rest line up with Nothing. It's like the whole thing is 1/4 to 3/4" out of place.

I went thru every friend, and have not found a good match for this shaped / design PS.
It measures : Across the fan and elec. side 13cm/5-1/8" (opp.side is wires); top of fan to bottom of case 9.5cm/3-3/4" (exposes to rear of PC case entirely filling the space that's open), Front to back of 'box' 15cm/6". and the four screw holes are precisely one at each Corner of the box shape .
These are the measures for the
PS removed - a Compaq 220W part # 277979-001 ATX.
Now, I've got $150 tied up in power supplies I'll have to exhange or return; and still no power to the EVO.
The Trupower measures: rear exposed side=14.9cm/5-7/8"across, 8.5cm/3-3/8" Up & down, front to back (from fan back to wire side) 13.9cm/5-1/2". and it's screw holes are located in the most common placement I've seen in three days of searchin !! Two along top, One at lower Fan-side edge 1/2"up from bottom, One across bottom lined up almost under elec.socket, no corner hole.

All the wiring and connectors are fully identical (20/24pin).

Back story: Had it all up , running, had cloned the 120GB from the 40GB's data and system. Tested, etc. diagnostics, properly partitioned, installed, etc. Had only 'thought' about PS for a millisec. didn't appear to act problematic during my two days after assembly when I tested .

They ran it for four days, then on the fourth -they were in the middle of burning a CD, and the system went down, botched up the 120GB drive they brought it back over to me when it booted only to black and a dos message. NTLDR missing, etc.

I took out the 120GB (got that recovered via another test machine), , set it aside for safe keeping.
the 40GB was still operational - set it aside.

I ordered the new larger power, figuring that my idea was true, the demands on the system would be bigger than that 220W would handle over time - when it got here - all the screw holes are not lining up, and apparently, Compaq offers no further suggestions - but 'get another 277979'....Ugh. I phoned all over their tech support and sales.

Have done massive read-up on form factor standards, and the ps that came out of it was OEM Compaq - but manf. by ??? originally before label.

HELP !!! Please Ideas, devices, I've already tried to find a small metal panel to 'adapt' the space/screw differences - yet not block the FAN and ELEC. connect. I tend to like building machines, but don't want to tear this one entirely apart to put into a new case, just wanna install a larger ps.
Help.

Nanci

 

Sorry, I didn't read your entire post, it's a bit too long for my limited attention span But I think I get the jist of it.... I've done work on Evos in the past, and you're 100% right, they don't use standard ATX power supplies. If you order it from Compaq, it'll probably cost over $150 (I was quoted $169 about 2 years ago). You can usually buy 'em on EBay for about $80 or so... I Googled the part number (277979-001) and found many replacements, most under $100....
http://www.acsoutlet.com/277979-001-Desktop.aspx
But you're looking for a stronger power supply, more wattage and such. I think you'll be hard pressed to find one. It is possible to find out who originally made the Compaq power supply by going to a govt web site and typing in the "RU" number. Look for a backward R with a U growing out of it on the sticker, then find the little number under it. This is the manufacturers number. I don't remember the exact site, but this article can help you:
http://www.hardwaresecrets.com/article/370
It tells you exactly what to look for, and where to go online to look it up. I hope it helps!

 

Thank you. Links added to list.

also considering the 'Lost Cause" factor. Already checking for a whole new case with Power supply (not a cheapy - been thru this part before).
Disassemble, reassemble, incorporating new hd and slave. Likely less headache for +$25 over just new PS and all this.

BUT.. I might give this a try tomorrow !! >>

My son just got off phone, said to do:
1) hardware store, find a small sheet metal patch (of course, with holes the right size) and secure the top corner screw to the case ,
2) just Use the off-side hole that's under the elec.socket - screw the patch to the case frame, screw the ps to the other hole in patch plate.
1" x 1-1/2" maybe 2" plate.
Make the TruPower "fit".
done deal. A McGiver-Fix.
It would hold I believe.....it's a snug fit to begin with up in that corner.

Sound reasonable?? - for left over space in case-back... use a metal slide from a PCI slot opening. Just to keep excess particles from entering case. Not blocking fan. screw down where it can.

Thanks again, N.

 

Hey, whatever works, right? Good luck with that!
You mentioned just starting over and moving all the hardware into a 'whole new' standard case. I think that putting all the hardware on a standard, universal platform is an EXCELLENT idea. Get out of the proprietary form factor, and into the open architecture. Keep in mind, those Evos were designed during a time when many different manufacturers were using non-standard platforms. This applies to the power supply problems you've already experienced, but also to the motherboard screw patterns. Many PCs built around that time (2002-2003 I think, maybe into 2004) used proprietary hardware, so replacement parts HAD to be purchased from the manufacturer or an authorized affiliate.

 

Yes. Thermatake has a nice one for under $75.

But I would just get his hard drives into a working case w/appropriate power at this point. I have a tech 293pc. screws & such kit. Hopefully no big prob cross- fitting mobo - just be sure to have variety of risers, etc.

Still gonna give McGiver a try in the A.M. - if it feels too shaky......then, off to the stores. Losing patience w/ this Compaq. Ugh. proprietary parts !!
Nan

 

"... a 'whole new' standard case. I think that putting all the hardware on a standard, universal platform is an EXCELLENT idea ..."

Second that motion. Proprietary machines are a real headache sometimes when it comes to replacing/upgrading. (Not to mention lack of working space inside.) ISA (Industry Standard Architecture) is the way to go. An ATX case/enclosure should have all the "standard" mobo mounting holes in the panel for mini, mid, and full ATX motherboards. As mentioned, just be sure you have enough standoffs to screw into the mounting plate to mount the mobo.

 

Amen, Ordered a Thermatake unit w/PS this morning (way under $100)
when the McGiver trick still just seemed too shaky to allow it to stay. Went down hardware store, got three diff. packets of brackets. Holes were fine, but PS still wanted to wiggle a little when tower got even slightly moved on the table. I like that bad boy to be Rock Solid when it leaves my table !!
Scrapped that idea.
I stated earlier, I already HAVE a full supply of every & any attaching pins, screws, risers, stand-offs, screws , washers, and so on , and so on. Had invested in full set of tools, toys, and parts box when I got my MSCE. Sorta my party to myself....after two years on the books !

This is my 214th machine - and I'm an ole lady workin' in my house since 2005 !!! Hubby's work is a great place for word-of-mouth, and my four grown kids' and their circles. !!!

Nan
I won't be back to this thread for a few days, til shipment arrives. And even then.....it oughta just make my day, with no further assist. hurray.

Will However keep thought in mind when posting to remind folks that 'some' machines are proprietary parts. Hopefully others won't get the headache !! LOL
Nan

 

"I already HAVE a full supply of every & any attaching pins, screws, risers, stand-offs, screws , washers, and so on , and so on. Had invested in full set of tools, toys, and parts box when I got my MSCE. Sorta my party to myself....after two years on the books !

This is my 214th machine - and I'm an ole lady workin' in my house since 2005 !!! Hubby's work is a great place for word-of-mouth, and my four grown kids' and their circles. !!!"

You rock Girl! Sounds like you're having fun, the way a task should be.

"I love it when a plan comes together"
Hannibal Smith - The A-Team