Suddenly.. no POST

[TSR2]

Chaps,

Remember if the board is properly dead, the PSU wont come on and you won't get any power at the SATA or molex connectors. From memory its a 5v rail provided to the motherboard from the PSU, and thats all that is provided by the PSU. When you switch the computer on, the completes a circuit and the rest of the PSU comes online, including the 12v rails for the SATA, Molex and graphics cards etc. If the board is properly dead you shouldn't get anything at the molex / SATA connectors.

[DaveB]

Hi Mike

I'll take sympathy for now It's true to say that I'm a mighty pi$$ed off bunny.. the thought of spending more money really does nothing to ease my state of mind. Duff 8800.. replace it with GTX560Ti (which it has to be said I couldn't really afford).. replace PSU a day after installing 560.. PC didn't start immediately after installing new PSU.. limped with it for a week until finally, no start at all. Fans wind up, pwr indications on 560Ti and mobo but no POST. One b1oody thing after another so here I am back on the XP3200. I could I guess rip the new PSU out of the 3200 and try it in the intel pc though at 550w.. it doesn't have the pwr I'd like to have handy.. 650w. Is it possible that a knackered mobo could bust a new PSU I still have things to try (mobo battery for one.. a different, old but working graphics card for another) but I'm losing the will to continue farting around

Tks for that Ben. It may well be that the mobo really is buggered then.
ATB
DaveB

[tonymadge]

Dave I do think that it could be a dead PSU it would be odd if your mobo had gone... but then again... I would rip that PSU out of the old PC just to test. Then I would get a cheap 650W as I have no faith in paying all the money for a supposed decent PSU for them to fail so quickly....

[ianhind]

Another PSU and an older video card would let you see if either the E8400 or E6600 would boot - at least it might help narrow down the culprit (unless the E6600/E8400/Asus motherboard are all screwed!).

Another option would be to try the new PSU in the 3200.

But a whole load of messing about.

Ian

[DaveB]

You know.. I'm wondering now if the 8800GTX had actually let go. I presumed it had as I restarted it once and got the same screen I'd got when I shut it down. This lead me to believe the video ram had held the last image onboard and hadn't cleared it though how in gods name this had happened is a mystery.. it's something that came into my head at the time

I can certainly try the new PSU in the 3200 (minus the 560Ti) even though this is a bit of a pain. It's less of a pain than taking the new TX650 out as it's modular and the TX650 isn't (and don't I know it)! I'll work something out in my head and see what pop's out

ATB
DaveB

[DaveB]

Update on the no POST..

A kind benefactor sent a replacement board with cpu and ram. I bought a new HD to go with it with the intention of loading Win7. Plugged it all up yesterday and.. the pwr kept cycling on and off every 5 or so seconds. Fearing it WAS the PSU, I bought another PSU which arrived this morning (good old Ebuyer.. I only ordered it last night AND postage was free) .. this time an Antec TRUEPower NEW 650w and it too cycles the pwr on and off every 5 secs or so. Changed the GTX560 for an ATiHD2900XT (which worked the last time it was used) and still the same. There is nothing else I can change so I'm giving up. I'm guessing the replacement mobo was packed a little tight which probably resulted in it being damaged in transit. Decent LGA775 boards are now almost non existant (in DDR2 flavour) and I can't warrant spending £300-odd quid on a new board/cpu/ram

Where's that hammer

ATB
DaveB

[Chris Sykes]

Hi Dave,

I take it your not able to get to the BIOS screen because of the power cycling?

Might be worthy diconnecting all RAM, GFX Card, any other cards, and the HDD's. Seeing if it fails at POST. If your still power cycling then its PSU or Mobo. Have you tired both PSU's in your other machine?

BTW whats the manufactures warrenty on the mobo? Worth checking, you could try the Sales of Goods act on them? If not could try ebay, there are some 775 DDR2 Mobo's about...

[Chris Sykes]

I failed to mention, I always buy branded PSU's way over required wattage required, a few reasons for this...

Brand is better than the cheap unbranded... The weight of these should speak for themselves, the hevier the better!
Brand = manufacture warrenty, unbranded = unkown if shop goes bust ect.
Over wattage takes into account usage over age and future expansion...

Dave im also looking at swapping my 8800GTS's for the 560 TI's, what did you think to them?

[tonymadge]

Bloody hell Dave you have been through the mill with this... I am not sure now whats faulty and whats ok!!

[DaveB]

Hi Chris

I'm not sure about the manufacturers warranty on the original board (Asus P5Q Deluxe) but it's now just over 2 years old (2years 2months). This one suddenly wouldn't post after the new Corsair TX650 was fitted.. the other one having presumably failed (Corsair changed it anyway.. also at the 2 year mark.. I bought the E8400, mobo and PSU at the same time).
The board Ben sent is an ASRock P43DE and he was able to check it before posting.. getting into the bios no problem. I've not got that far since installing in this case. The system pwr cycles with both the new Corsair and the even newer Antec. Ben has suggested there may be a short on the case I don't have an alternative to try it in without stripping down another system. The ASRock came with a QX6700 and 8gig ram onboard which did, at Ben's, appear to work. However, he put the original intel heatsink/fan in the box too and I fear this probably knackered the mobo as pressure exerted on the box by the post office was enough to bend flat 2 of the 4 heatsink connector pins to right angles.

Re the GTX560Ti (mine is Asus flavour.. DirectCUII) I only got to see it work for around a week before the P5Q Deluxe stopped POSTing but was impressed with the way it ran. Very little time spent in FS but it hustled CoD along at an impressive rate of knots. Minimum PSU recommendation is 500w for this card and with what little I have attached to the system, 650w should be enough (2HD's and a DVDR). When I bought the Antec, I was tempted to go higher but by coincidence, Overclockers/Ebuyer/a host of others were out of stock of the next size up. The next size beyond that became cost prohibitive (850w) Neither the CPU or ram was ever overclocked on the P5QD.. I don't do that sort of thing (wouldn't know where to start anyway) If you decide to go for the GTX560Ti.. you'll find you have a bit more room to manoeuvre in your case as they're around an inch shorter than the 8800GTX and almost identical to the ATiHD2900XT I have (which I thought was big until I got the 8800GTX to replace it!)

I'm about as pee'd off as a pee'd off bloke can be. What if Ben is right and there's a short on the case? The only way I can check that is to buy another case and that's yet more cash I don't have One thing I thought of trying is to use the reset button instead of the pwr button (remove the pwr case connector and put the reset connector in it's place on the mobo). That might check the switch but it wouldn't necessarily prove or disprove if there was a short on the case somewhere Other than the case, the one thing I've not changed is the pwr lead/kettle plug. Surely it can't be that.. can it?

Late edit.. Tony.. no, neither do I

ATB
DaveB