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4700 Blinking Yellow Light
I've got a Dimension 4700 here that was working fine, but now it won't boot, the yellow light just blinks. The power supply fan and CD-ROM drive just barely begin to spin up but then immediately die. I've made sure the selection switch on power supply is in the proper position, all the cables on the motherboard have been taken out and plugged back in. I have unplugged all hardware and cables from the motherboard except for the 2 power cables going to the mobo and the power button cable. I tried unplugging the power button cable and jumping it with a flat head screwdriver to no avail. I'm running out of ideas here, any guesses?
- a blinking yellow power light means that something is malfunctioning or something is improperly installed. reset the ram by taking them out and putting them back in. make sure the power cables connected to the motherboard is properly secured in the socket. reset the graphics card if ur pc has one, and any other pci cards. hope that helps, ravi
DELL DIMENSION 2350 @ 2.60GHZ INTEL CELERON,512MB OF RAM, 30GB HARDRIVE
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DELL DIMENSION 2400CE "DIMENSION 2400 CUSTOM EDITION" @ 2.80GHZ INTEL PENTIUM 4 NORTHWOOD CORE 533MHZ FSB, 1GB OF RAM (512 PCR2700),(512 PCR 3200), 80GB MAXTOR DIAMONDMAX PLUS 9 HARDDRIVE-MASTER, 320GB WESTERN DIGITAL HARDRIVE - SLAVE; NVIDIA GEFORCE FX 5200 PCI @ 256MB, 845GV CHIPSET; MODIFIED COOLING SYSTEM @ 2 80MM FANS, 1 PCI SLOT COOLING FAN(FOR FX 5200). www.geocities.com/ravipcplanet/ - Unplugged all loads except MB and fans still only twitch? Motherboard core regulator is semi-notorious for causing that. Unplug P2. If the fans stay running now, MB is faulty.If the same thing happens, MB can still be faulty but it's tied with PS for likelihood.
- OK then, the P2 regulator isn't what's killing it.If you already have done these and got the same results:
- Tried it with all accessory cards removed.
- Tried it with drives' power disconnected.
Do this:
Get a helper, you're likely to need close attention to two things at once. Disconnect P1 and P2, reconnect power to harddrive and CD drive. On P1, jumper the green wire to any black wire with a paperclip or such. Have the helper observe the fan.
*If it stops running as before, end the test, replace power supply. Reason, it won't run with a minimum load, and motherboard is ruled out.
*If the fan now runs continuously and the harddrive starts and the CD drawer will open (helper), you're back around 50-50 between PS and MB. PS could be too weak to run MB (but can run drives), or MB is killing PS with an overload on P1 (we already tried P2).
PS testers won't give you any more data than this unless they are very sophisticated. PS is generally cheaper than MB. MB has more potential ways it can fail and indeed fails more often. Get the one that if it's wrong you wouldn't mind having a spare of. Or flip a coin.
- if the computer is not even giving beeps, i have come to suspect that the mobo is dead. , ravi
DELL DIMENSION 2350 @ 2.60GHZ INTEL CELERON,512MB OF RAM, 30GB HARDRIVE
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DELL DIMENSION 2400CE "DIMENSION 2400 CUSTOM EDITION" @ 2.80GHZ INTEL PENTIUM 4 NORTHWOOD CORE 533MHZ FSB, 1GB OF RAM (512 PCR2700),(512 PCR 3200), 80GB MAXTOR DIAMONDMAX PLUS 9 HARDDRIVE-MASTER, 320GB WESTERN DIGITAL HARDRIVE - SLAVE; NVIDIA GEFORCE FX 5200 PCI @ 256MB, 845GV CHIPSET; MODIFIED COOLING SYSTEM @ 2 80MM FANS, 1 PCI SLOT COOLING FAN(FOR FX 5200). www.geocities.com/ravipcplanet/
ravik521
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Posted March 7th, 2007 22:00