Bad P5P800S boards
My company has built systems using the ASUS P5P800S boards. These systems run 24/7 and we used ASUS because we believed that they were good. Noooo..... We have now had 3 (yes 3) of them fail after about 12 months of use - i.e fail to boot or crash while running. All had bad 820mf capacitors. There was no consistent pattern to the failures other than they being 820mf. One board had 1 bloated cap. The other 2 had 3 bloated caps. I am now going to see just how good the ASUS 3 year warranty really is. I will keep you informed.
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My company has built systems using the ASUS P5P800S boards. These systems run 24/7 and we used ASUS because we believed that they were good. Noooo..... We have now had 3 (yes 3) of them fail after about 12 months of use - i.e fail to boot or crash while running. All had bad 820mf capacitors. There was no consistent pattern to the failures other than they being 820mf. One board had 1 bloated cap. The other 2 had 3 bloated caps. I am now going to see just how good the ASUS 3 year warranty really is. I will keep you informed.
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Re: Bad P5P800S boards
what is the brand/series of the caps? -
Re: Bad P5P800S boards
Thanks Willawake. The boards are in my office and with the Xmas holidays I wont be in until Wednesday. I can tell you that the mobo's have two types/series/brands of caps (black and green). All the failures have been green.Comment
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Re: Bad P5P800S boards
The capacitors are green 820uf 6.3v 8mm. They have the following markings - MB 105C(M), 4715D and an eliptical logo that reads LTEC. I hope that this helps.Comment
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Re: Bad P5P800S boards
We have another bad P5P800S MB. That makes 4 now.Comment
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Re: Bad P5P800S boards
Sounds like traditionall badcaps again. Can`t understand why Asus dammages their reputation by sutch obviousely silly deals.
The 820uF valued caps are usually only used with solid polymer caps.
May be there was a very very clever beancounter at work wich thought that elektrolytics would be far cheaper than the solid ones.
may be the boards are OEMed by one of the cheapies out there.Comment
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Re: Bad P5P800S boards
real common failure.
i get lots of these in for recapping.
those cheap caps wont last in these hot systems.
i have seen ltec,elite,and yec on these.Comment
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Re: Bad P5P800S boards
It's clearly a mis-application of a low-valued electrolytic in place of a polymer - those should have been 1500uF or higher. Ltec isn't the worst out there - AcBel uses/used Ltec in their PSUs, so they must be OK. However, a fair number of otherwise reasonable series (Nichicon/Taicon HD, Chemicon KZG, an occasional Rubycon MBZ, Fujitsu polymer, ...) have been failing under high temperature, high ripple-current conditions like that found on the Vcore VRM output rail.Comment
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Re: Bad P5P800S boards
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Re: Bad P5P800S boards
A VRM is far more demanding then an usuall PSu, i would say it is not even comparable. This is simply a to low rated cap in a demanding position, but shure the only reason was obviousely to skimp down a few pennies.
I do not say, that Ltec is absolut crap, but no way that it will survive on an skimped down BOM VRM like usuall today.
To be honest, in my PSU i would not want Ltec caps ;-)
And in the end, the whole badcaps story is always based on the need to skimp a few pennies and some badcaps provider who accept to make this shit that ass cheap that even they earn some money.
If it was an engineer who made this decision, than he was either braindead or he was clueless how to compete with Asrock or ECS without a complete new desinged el cheapo layout.Last edited by gonzo0815; 03-14-2007, 08:05 AM.Comment
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I have three identical-spec 820-01700 boards (2.6/32/512), and ALL THREE boards came to us with the same fault, from different sources: The boards don't wake from hibernation with the keyboard or lid, they ONLY wake when you press the power button. I understand this is a very minor issue, but the boards must be fixed!
We will of course begin with the obvious (checking lid signals), but I couldn't help but notice these three boards were all 32GB variants. Has anyone noticed an issue relating to these 32GB boards in particular? I of course don't think it's a RAM issue, but it's bizarre... -
We've now created a stack of 10 boards that have the same issue, which we suspect to be CPU-related. The issue is very simple--the board will not boot to anything, only showing the exclamatory sign inside a circle. No amount of DFU/restore, wipe/erase, etc, will resolve the issue. No boards have physical damage. We went ahead and replaced the SSD nands on two boards (one 02020, one 02016) and the issue remained exactly the same. We are considering replacing the CPU on one of the boards using a locked CPU, just so we can see if it resolves the issue.
Has anyone else run into this... -
I'm looking to upgrade several 8GB 820-00850 boards to 16GB or 32GB for personal use. I am curious what the best practice and process is for sourcing new replacement chips, and what vendor(s) you guys prefer? Another question is, how do I find compatible chips and their corresponding part/model numbers? For example, in the 820-00850 schematic, the DDR chip U2600 model listed (EDFB232A1MA) corresponds to 1x32GB chip. Of course, I would need 4x8GB chips to replace the 4x2GB chips currently on the board. How do I find compatible 8GB chips? Is it as simple as searching "BGA178 8GB 2133"...
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Hi friends, last week I got 3 same boards for repair (NM-D562 Rev. 3.0), same problem, power button light up, but motherboard wont start.
3,3V_alw and 5V_alw, 1,8V_alw and 0,75V_alw presented on all 3 boards, no other voltages. 1,2V missing and if I checked schematic right, I need 1,2V and than can be +3VS and +5VS generated after getting SUSP_N signal from KBC? or vise versa?
I checked for low resistance on coils, no low resistance.
Anyone with same issue like me?
Thanks for any help. -
I have a TC-P65S2 that blew an SC board (I had a previous post about some cross references). When I put the repaired SC board in, it worked with the SD and SU boards isolated and SC50 jumped. I reinstalled the SD and SU boards. I did forget to remove the SC50 jumper, but from what I understand about how that jumper works, that should not cause SC board destruction with properly working SC/SD/SU boards. When I turned the TV back on, the SC board blew again. Based on the fact the SC board was working without the SU and SD boards, it at least makes sense that one or both of them is bad.
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