Solved Why can I not get a Bios start?

June 8, 2019 at 08:27:44
Specs: Windows 10
I have a Medion MS-7646 with Msi mother board and American megatronics BIOS. Processor 2.6Ghz AMD Athlon II X4 620, 3Gb mem, running Windows 10 home 32-bit. This computer is a "back-up" hence a few weeks since last started. This time, during start-up it messaged "hard drive faulty, repaired", completed start-up. Windows then informed that an update was necessary, seemed to do that then shut down for a restart. Didn't restart.
Pressing the start button gives case light , PSU and CPU fans but nothing on VDU, no sounds and no light in mouse.
Checked VDU - displays its logos etc. when first switched on and then "no signal".
Opened up the computer and checked all connections-OK.
Removed video card GT720 and plugged HDMI cable into m/b socket.
Tested PSU for 5v, 12v etc with testmeter, OK. Tried an older PSU that used to work OK in previous machine. no change.
Tried start up pressing F8, F12, del, and with Medion recovery disk or Windows repair disc (DVD tray activates and seems to spin up). Plugged in a new HDD to see if it would start as a new build, no go.
The only fault found was BIOS battery failed (down to 0.5v!),replaced, no change as expected (other postings on this site tell me that would be so).
Summary:- delivers power to case lights and CPU fan (via m/b) but not to mouse and probably keyboard. Will not take info from DVD and can't communicate anything to speaker or VDU.
Help needed. Tony

message edited by Womble40


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#1
June 8, 2019 at 08:59:38
✔ Best Answer
First, try booting with the hard drive disconnected. A faulty hard drive can prevent the computer from POSTing. A hard drive is not necessary to boot into the BIOS screens. You DO need some sort of Video in order to SEE the BIOS screens so insert the graphics card. All that is required in order to POST are the following components. power supply, motherboard with CPU/heatsink/fan, graphics, monitor, 1 stick of memory, keyboard.

Are you using a PS/2 keyboard? If not, do so. Also start continuously tapping the Del. key as soon as you turn on the computer.

Once in the BIOS (setup) screens reset time, date, boot order, etc. Also, look for a setting to use legacy USB support. That should allow you to then use a USB keyboard in the BIOS screens.


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#2
June 8, 2019 at 09:35:58
Have already tried without HDD, no sounds etc. The original machine did not have video card, however with or without makes no difference. Keyboard used for test is a PS/2 and mouse is a USB. Pressing DEL (or F8 F12 etc) didn't work

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#3
June 8, 2019 at 09:40:57
Well I never. Took out one of the mem sticks, tried the F8 etc, lo and behold starting with DEL presses has got me beeps, mouse light and BIOS screen. Thanks. Tony
Further to this message, it went once again into "scanning and repairing Drive C"starting at 29%, then into working on updates starting at 90%. We then had a fight over passwords (haven't used one on this machine for about 8 years!) followed up by a worrying 10 minutes of black screen - but light still on in the mouse. It is now finally int Windows, so hopefully I can shut it down and put it all back together again. I have been working on and off with computers since 1964, but would never have thought that taking a memory stick out would get it to do something, amazing. I presume that it was a software problem somewhere with the two acting fighting each other. Again many thanks.

message edited by Womble40


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#4
June 8, 2019 at 14:44:59
Try removing the memory sticks one by one and using an eraser on the contacts. Then snap each one in 4 0r 5 times to burnish the contacts. Memory can go bad but it is more likely corrosion on the contacts is the issue.

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