Solve : Motherboard Failure? OPower but no beeps, POST LED?

1.	Solve : Motherboard Failure? OPower but no beeps, POST LED?
Answer» Hi, some one gave me (from someone else) a Sony vaio pcv-rx470ds PC (Intel 850 chipset), with what appears to be a dead motherboard. After turning it on, the fans spin but the screen stays black, and the PC emits no beeps. The LED's on the Keyboard flash once at start up (so the fuse is OK), but then stay off, and the keyboard is dead. Hitting Ctrl Alt Del or sleep buttons does NOTHING, nor will the Caps light or any other LED work. The monitor and the video card both work with another PC (the one i am using), as well as the HARD drive. Trying a different monitor makes no difference. The only lights on the front of the PC that ever do anything (no floppy or optical drive seek) is one for the hard drive, which stays lit for about 20 seconds and then goes off. Nothing will make it do anything after that. Placing a windows start up disk in the floppy makes no difference at start up; the floppy (nor the CD) drive is never checked (no lit LEDS). Inside the case there are no LED indicators that go on. The power supply voltages (red=+5 v, yellow=12v) seem fine. The motherboard shows no signs of decay, such as capacitor plague http://www.answers.com/topic/capacitor-plague Does anyone here see anything else but a a mobo failure? I would also like to ask if anyone knows who the motherboard manufacturer is for this (Sony vaio pcv-rx470ds), and what the socket number is (i think it is 423), or how that relates to ordering one. And what do you think would be a resonable cost? Never got this far before. Thank God for your help.Have you tried resetting the BIOS.Drivers>>http://www.vaio-link.com/downloads/register/register.asp?l=en operating system on hard drive is?..Have you tried Reseating the Ram or trying it in a different slot. Or tried a different STICK of Ram.Thank you both for your replies. The OS is XP (i did not list it bcz it never boots as far as the OS), and i did not reset the bios. I will have to look up how to do that. I took the mobo out yesterday and cleaned it of dust, and reseated the cpu, and made sure everything was plugged in well. Everything looked very good, no real signs of wear, but the same thing happens. It starts but never even shows anythng on a screen. I will try resetting the bios next as it cannot hurt? Also i may try removing everything from the mobo excpet the pc speaker, and see if i can at least get a beep when i power it up. It is a micro-atx, socket 423 Thanks again, DAN Quote and i did not reset the bios. I will have to look up how to do that. To reset the BIOS, take the following steps: 1. Power down computer 2. Take countermeasures against electro-static discharge 3. Remove computer casing 4. Inspect mainboard for a CMOS jump switch or CMOS battery In case of CMOS jump switch: Follow instructions provided with the mainboard manual. In case of CMOS battery: I. Remove CMOS battery for approximately 10-15 seconds. II. After 10-15 seconds, place the CMOS battery back. 5. Power on system. *Do not power on the system when CMOS jumper is set to clear_cmos* or when CMOS battery is non-present.** Thank you very much for trying to help. I took the cmos battery out and putting it back in after about 30 secs, but still no screen, beeps, posts, etc. at power up. I also tried powering it up after alternatively taking out 2 of the (2) twin memory sticks, then without the HD, as well as with a graphics card that goes in a PCI slot, but in each instance all i get is the fans running. I also tried taking the mobo out with nothing but the power to the board as well as the only line that would go to a PC speaker (Front Header Paner: see system reference manual at http://esupport.sony.com/perl/model-documents.pl?mdl=PCVRX470DS), but no screen or beeps at power up. There is power to the HD, as well as the other drives, but not as a result of software. What would you expect if it was a processor failure, versus the mobo? I do not have access to any other processor that would fit in this (and they are too expensive new). I have been using an AMD 650mhz (w/98se) extensively for years, with nothing like this ever happning. But it is a good learning experience. Yet i pray i can get it going. Thank you again and may God bless you for your help. dan May i ask why the person gave you this mobo! did they have problems with it! Do you have the mobo drivers!A relative of a friend in another state. I only talked to him only once, and he said it failed and thought it ws the mobo. I hope to try to talk to him agian and get details. I must go now, talk again monday. Thank you much for your help, in Jesus name.Have you tried using a different Power Supply Unit?God bless you for still trying. No i hacve not tried a different PS, as i do not have one that i am sure would work in this, and the voltages i have checked going to the HD are fine. It sounds like the mobo, and if it is the procesor then it is too much. I am praying and plugging, and will keep you posted. dan www.peacebyjesus.com Try using a different Power Supply Unit first. These are easier to replace without damaging anything.I only have one SPARE power supply from an old pc, and i am not sure how interchangable ps are. With the cd's, fans, and hd all getting power, i hope to check power going to the board soon. Meanwhile i have been prayerfully looking at some offers on ebay for mobos, such as this, which are cheaper than the offical ps for the vaio i think. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6795422133&fromMakeTrack=true I also saw compatible processors very cheap. The problem however is finding a micro atx, socket 423, which measures 9.6 x 9.6, and most of them seem to be regular atx boards, which are too long for the case. Of course, i think you can go with a socket 478 if you get an adapter for the chip. I'll keep fishing,

Answer»

Hi, some one gave me (from someone else) a Sony vaio pcv-rx470ds PC (Intel 850 chipset), with what appears to be a dead motherboard. After turning it on, the fans spin but the screen stays black, and the PC emits no beeps. The LED's on the Keyboard flash once at start up (so the fuse is OK), but then stay off, and the keyboard is dead. Hitting Ctrl Alt Del or sleep buttons does NOTHING, nor will the Caps light or any other LED work. The monitor and the video card both work with another PC (the one i am using), as well as the HARD drive. Trying a different monitor makes no difference. The only lights on the front of the PC that ever do anything (no floppy or optical drive seek) is one for the hard drive, which stays lit for about 20 seconds and then goes off. Nothing will make it do anything after that. Placing a windows start up disk in the floppy makes no difference at start up; the floppy (nor the CD) drive is never checked (no lit LEDS). Inside the case there are no LED indicators that go on. The power supply voltages (red=+5 v, yellow=12v) seem fine. The motherboard shows no signs of decay, such as capacitor plague http://www.answers.com/topic/capacitor-plague

Does anyone here see anything else but a a mobo failure? I would also like to ask if anyone knows who the motherboard manufacturer is for this (Sony vaio pcv-rx470ds), and what the socket number is (i think it is 423), or how that relates to ordering one. And what do you think would be a resonable cost? Never got this far before. Thank God for your help.Have you tried resetting the BIOS.Drivers>>http://www.vaio-link.com/downloads/register/register.asp?l=en

operating system on hard drive is?..Have you tried Reseating the Ram or trying it in a different slot. Or tried a different STICK of Ram.Thank you both for your replies. The OS is XP (i did not list it bcz it never boots as far as the OS), and i did not reset the bios. I will have to look up how to do that. I took the mobo out yesterday and cleaned it of dust, and reseated the cpu, and made sure everything was plugged in well. Everything looked very good, no real signs of wear, but the same thing happens. It starts but never even shows anythng on a screen. I will try resetting the bios next as it cannot hurt?

Also i may try removing everything from the mobo excpet the pc speaker, and see if i can at least get a beep when i power it up. It is a micro-atx, socket 423

Thanks again, DAN Quote

and i did not reset the bios. I will have to look up how to do that.

To reset the BIOS, take the following steps:

1. Power down computer
2. Take countermeasures against electro-static discharge
3. Remove computer casing
4. Inspect mainboard for a CMOS jump switch or CMOS battery

In case of CMOS jump switch:

Follow instructions provided with the mainboard manual.

In case of CMOS battery:

I. Remove CMOS battery for approximately 10-15 seconds.
II. After 10-15 seconds, place the CMOS battery back.

5. Power on system.

Do not power on the system when CMOS jumper is set to clear_cmos or when CMOS battery is non-present. Thank you very much for trying to help. I took the cmos battery out and putting it back in after about 30 secs, but still no screen, beeps, posts, etc. at power up. I also tried powering it up after alternatively taking out 2 of the (2) twin memory sticks, then without the HD, as well as with a graphics card that goes in a PCI slot, but in each instance all i get is the fans running.

I also tried taking the mobo out with nothing but the power to the board as well as the only line that would go to a PC speaker (Front Header Paner: see system reference manual at http://esupport.sony.com/perl/model-documents.pl?mdl=PCVRX470DS), but no screen or beeps at power up.

There is power to the HD, as well as the other drives, but not as a result of software.

What would you expect if it was a processor failure, versus the mobo? I do not have access to any other processor that would fit in this (and they are too expensive new). I have been using an AMD 650mhz (w/98se) extensively for years, with nothing like this ever happning. But it is a good learning experience. Yet i pray i can get it going. Thank you again and may God bless you for your help. dan
May i ask why the person gave you this mobo! did they have problems with it!

Do you have the mobo drivers!A relative of a friend in another state. I only talked to him only once, and he said it failed and thought it ws the mobo. I hope to try to talk to him agian and get details.

I must go now, talk again monday. Thank you much for your help, in Jesus name.Have you tried using a different Power Supply Unit?God bless you for still trying. No i hacve not tried a different PS, as i do not have one that i am sure would work in this, and the voltages i have checked going to the HD are fine. It sounds like the mobo, and if it is the procesor then it is too much. I am praying and plugging, and will keep you posted.

dan
www.peacebyjesus.com
Try using a different Power Supply Unit first. These are easier to replace without damaging anything.I only have one SPARE power supply from an old pc, and i am not sure how interchangable ps are. With the cd's, fans, and hd all getting power, i hope to check power going to the board soon.

Meanwhile i have been prayerfully looking at some offers on ebay for mobos, such as this, which are cheaper than the offical ps for the vaio i think. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6795422133&fromMakeTrack=true
I also saw compatible processors very cheap.

The problem however is finding a micro atx, socket 423, which measures 9.6 x 9.6, and most of them seem to be regular atx boards, which are too long for the case. Of course, i think you can go with a socket 478 if you get an adapter for the chip.

I'll keep fishing,

Solve : Motherboard Failure? OPower but no beeps, POST LED?

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