Question about SuperMicro SC743 TQ-650 - Tower - 4U - extended ATX - SATA/SAS - hot-swap - power supply 650 Watt - ... (CSE-743TQ-650) eATX Rack-Mountable Case

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After replacing power supply, system will power up, but the power failure indicator light will not go off and the system will not boot. No power to the DVD or floppy drives. What might the issue be?

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Unplugged cable.

Posted on Mar 21, 2011

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Power indicator light comes on my laptop but no display and system will not boot andmyou can'tnget it to reload or get in to system bios.


Any damage? Drop? You get Nothing? No fan spin? No LED's blink? Nothing? You didn't supply the Toshiba model or the OS? How old? Is it time to replace the CMOS battery?

Jan 27, 2013 | Toshiba Satellite Computers & Internet

1 Answer

Hp s3644uk wont boot


if you had lightening activity in your neighborhood, and the system was plugged into a wall socket, it may have suffered a power failure and thus, the power supply has been affected by current surge. If the PC system is one year or less, refer to contacting HP techsupport for support : you will have to replace the power supply

Nov 14, 2012 | Computers & Internet

1 Answer

Laptop wont turn on, got green pwr and amb bat but will not fire up


Systems covered: All failing to boot without lighting up display.

Goal of this Solution: Try to determine whether system is (a) booting successfully while failing to light its display (indicating hardware failure in the display), or (b) failing to light the display due to failure to successfully transfer control to ROM BIOS (indicating a motherboard failure).

The fact that the Green power LED, and Amber Battery LED are lit seems to exonerate the laptop power supply (brick) circuitry. Even with a nearly dead battery, a Toshiba Satellite 1135-s1552 should work while plugged into a properly functioning brick.

Here's Toshiba support's (244 page) online PDF version of your laptop manual:
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=SB&os=&category=&moid=434997&rpn=PS113U&modelFilter=1135-S1552&selCategory=2756709&selFamily=1073768663

If the HDD (hard disk) activity indicator LED is active after power-on, then your system has actually got past BIOS and is booting - your LCD monitor inverter circuit or Backlight may have burned out - and to use the system, you'll need to connect an external monitor to the RGB monitor port on the back of the system (see illustration on page 32 of User's Guide) to view system activity.
Alternatively, one may attach an analog TV, using the S-Video port on the back of the laptop (see illustration on page 32 of User's Guide).

Once an external monitor is working to display the ROM BIOS part of the boot sequence, you may find that the ROM BIOS is good enough to run a few BIOS-based diagnostics. Run them all - something may indicate the source of the boot failure. Ofttimes, enough of the motherboard remains good to provide interaction with the ROM BIOS, but some motherboard failure will subvert a full boot to Windows/Linux. An example of this type of failure would be a failure of the PCMCIA bus controller, which is vital for booting a disk-resident OS, but unaccessed (except by BIOS diags) when the user interacts with BIOS. Another common failure of this type is main memory (RAM) failure.
A working external monitor/TV also provides a chance to backup important laptop data to a flash drive, sky drive, or CD-RW discs.

If no HDD activity is seen after power-up, then either your BIOS is hosed (in which case you'll need a new motherboard), or another motherboard component is hosed (in which case you'll need a new motherboard).

You may want to transplant the HDD into a working PCMCIA-bus system (any laptop) to recover/backup your important data.
If someone recently attempted and failed to update the motherboard's ROM BIOS, then you know why the system is failing to boot and also failing to light the display.
Here's a link to a site with disassembly instructions for Toshiba laptops:
http://www.irisvista.com/

Most dead laptops (even those whose power supplies have been burned out by a nearby lightning strike with the system on 120 VAC power) will still have perfectly usable HDD module(s), and RAM memory cards, so that at the very least, these removable components may be recycled into memory reserves for your next laptop or sold (Ebay.com) to help defray the cost of a new system.

Dec 14, 2011 | Toshiba Satellite Computers & Internet

2 Answers

My Toshiba laptop won't turn on. It has no charge and we have tried taking out the battery, holding the power button for 20 seconds. The light on the side are on but the screen is black... Please help!


This sounds like a major motherboard failure, but first we need to check a few things. The power supply should be subbed for another to make certain it is not the adapter, this is important because I have seen them operate partially fooling you into thinking it is okay. Now you mentioned a light on, is that the power on indicator? if that is the case and the power supply checks out, It is a motherboard problem and should be checked by a computer tech with an estimate.

Jan 15, 2011 | Toshiba Satellite L455DS5976 Notebook

1 Answer

Screen will not come on hard drive light no light checked power supply is ok


Things to check:
  1. Power led on the front of the tower, it should be solid green when on. Flashing Amber is generally an indication of a bad power supply inside the tower
  2. Power LED Solid AMBER indicates system is not finishing the power on self test (POST) and you remove all connections from the tower except power and try turning on again. If no change, remove all PCI and PCI-E cards from system, try again, no change replace motherboard.
  3. On the back of the tower are 4 diagnostic LEDs near the ps2 ports marked ABCD, after the POST, during a normal boot the will flash in several sequences and with boot is finished all 4 should be green. If they stop an a different pattern, then that indicates a failure Yellow Yellow Green Green indicate bad RAM for example
  4. If the LEDs on front and back are Green then the system appears to be booting but the monitor display is not functional

Feb 05, 2010 | Dell Dimension 4600 PC Desktop

1 Answer

Power light flashing orange, checked all cable & all secure - any ideas?


If the system is a Dell system then the power LED is indicating a failure in the power supply.
Disconnect all external connections except power and see if the indications change. If no change, then open the case, disconnect power to all drives and remove any PCI expansion cards, see if any change. If there is a change, add items back one at a time till the failure is determined, If no change, replace the power supply,
http://www.newegg.com/Product/Product.aspx?Item=N82E16817170010&cm_re=power_supply-_-17-170-010-_-Product

Dec 25, 2009 | Dell Computers & Internet

2 Answers

Solid amber light. No power to the system just the fan runs.


Solid amber light means the CPU is not being powered properly, that is USUALLY a bad power supply. Contact Dell and order another power supply. if that doesnt fix it, you have a bum board. (usually, you will see popped capacitors on the board if its bad). I will say, that in about 70% of these, its a bad power supply. power supplys arent cheap (unless you have a warranty of course) but they wont break the bank. a replacement is likely going to be about 40-70 dollars. I havent priced it, but you can ask dell at dell.com/chat. Good luck.

Nov 19, 2009 | Dell DimensionTM XPS 710 PC Desktop

1 Answer

CISCO 2600 Router Troubleshooting


This is the indicator configuration for the 2600, if the lights are yellow there is a problem.

The following indicator LEDs provide power, activity, and status information:
POWER (green)—Lit when power is on
RPS (green)
Off—No redundant power supply (RPS) is present
Blinking—System is booted, RPS is present, RPS failure
Continuous on—System is booted, RPS is present, no RPS failure
ACTIVITY (green)
Slow, steady blinking—System is booting
Blinks during system activity, such as interrupts and packet transfers
I suggest going to Cisco.com for full documentation on this product.

Feb 19, 2009 | Cisco RPS 22/18 (cab-rps-2218)

4 Answers

Dell Dimension 5150 PC


this sounds like a motherboard fault, the green light shows power to the board but the orange can indicate that the board has failed

Sep 15, 2008 | Dell Dimension 5150 (DIM515MIN) PC Desktop

3 Answers

When powering up my computer, I get a failure. Primary hard drive 1 not found Strike the F1 to continue F2 to run the set up utility. I think the power supply fan is not working. What do I do?


your system can not detect your primary hard disk which host the operating systems,so you check the data cable to the hard drive and the power supply to the hard drive for supply

Jul 19, 2008 | Computers & Internet

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