|No video at all is usually merely a symptom, and there's actually nothing wrong with the video adapter or the monitor - something else is wrong.|
"FYI, Display card is inbuilt"
The term CARD is frequently mis-used. A CARD is plugged into a mboard slot and can be removed. In this case, it's a video or graphics or display adapter, but if it's built into the mboard and cannot be removed, IT'S NOT A CARD !!
Any monitor that works with the other working sun blade 150 servers should work with the two sun blade 150 servers that you're having problems with.
A single beep while booting can be either the same as what you normally hear on the other working sun blade 150 servers , indicating the mboard POST has completed successfuly, or it can sound different and indicate an error - lower or higher tone, and/or shorter or longer in duration. Does the beep sound the same as on the working sun blade 150 servers ??
The most common reasons for no video are
- there is a problem with the reliability of the connection of the ram in it's slot(s)
A common thing that can happen with ram, even ram that worked fine previously, is the ram has, or has developed, a poor connection in it's slot(s).
This usually happens a long time after the ram was installed, but it can happen with new ram, or after moving the computer case from one place to another, and I've had even new modules that needed to have their contacts cleaned.
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
In this case, you can consult the Service manual, or the ram installation document, for the sun blade 150 series - see below
- somone installed ram that is NOT compatible with using it in the mboard. E.g. this sun blade 150 series can use 512mb SDram modules, but it's probable only ones that have 16 chips, 8 chips on each side, NOT 8 chips on one side, will be compatible.
In this case, since you have other working sun blade 150 servers, any ram that works in the working ones will be compatible with using it in the ones with no video.
- the power supply is failing.
Failing power supplies are common and can cause your symptoms.
Check your PS.
They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.
See response 4 in this:
If it is failing, you can usually replace it with any decent standard sized standard ATX PS with the same capacity or greater.
Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.
Don't buy an el-cheapo PS.
See response 3 in this:
NOTE that it appears these sun blade 150 servers use mostly if not all standard PC computer parts.
The power supply is probably a standard wired standard sized ATX (or AT?) power supply. If it is, the main power connector from the PS, which probably has a one piece 20 position connector if it's ATX, with 19 or 20 of the positions having one or more wires, the wire colors being the same at each position as for a standard ATX power supply.
In any case, any power supply from one of your working sun blade 150 servers should work fine in the ones that have no video.
- there are loose connections inside the computer case.
Unplug the case/power supply, or switch off the AC power to it otherwise.
Power off your monitor.
Open up the case. Check all the connections of the wiring to make sure they are all the way onto their pins and into their sockets, especially the main connector from the power supply. The wires close to the mboard going into the main power connector/socket should be more or less perpendicular to the mboard surface rather than at an angle. Make sure all cards in slots are all the way down in their slots.
This is unlikely, but certainly possible....
Since these are relatively old computers, it's possible that they had electrolytic capacitors installed on them that were not properly made, and those tend to fail eventually.
Examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .
This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
Sun Blade 150 Workstation - main support page
Sun System Handbook
Sun Blade[tm] 150 Workstation
Information areas - only the blue links work
Related Documentation - manuals:
Includes ram installation info.
In that list....
Sun Blade 150 Service Manual
Lots of info in that, including pictures, diagrams.
Sun Blade 150 - Full Components List
Diagrams near the end
Part number 370-4872 - Mitac 250 Watt Power Supply
Sun Blade[tm] 150 Workstation: Hardware Specifications
Graphics - supported cards link is no longer valid
4 ram slots - 128mb to 512mb SDram modules in each slot - 2gb total maximum .
Third party parts available: