Battery change on T2542.

the CMOS battery is dead.... change it... it will solve ur problems

Hussain - Greetings!
Do the following:
1. Turn on computer by holding down power button while pressing the ESC key.
The machine will beep, then display: Check System, then press [F1] key.
2. Release ESC key
3. Press F1 key
You should now have the BIOS screen
Regards, Mikeywaf

In general, unlocking a microwave is usually one of the following:

1. Push and hold 'start' until it beeps or display changes
2. Push and hold 'clear/cancel' until it beeps or display changes
3. Push 'start' several times until it beeps or display changes
4. Push 'clear/cancel' several times until it beeps or display changes
5. Push and hold 'child/lock' until it beeps or display changes

If all these suggestions fail, try unplugging the oven for ten minutes and trying again.

I would suggest this generic Power On switch,

1) http://www.directron.com/atxswitch.html,

and the Red, and Black twisted pair of wires go to the Power On switch.

Your statement of ,"....don't know which of the colored pairs of wires go.....", leads me to believe you may have all of the Front Panel wires disconnected.

How about information as to where ALL the Front Panel wires go?
(Provided I have correctly interpreted your statement)

Back in the time that the eMachines T2542 was made, TriGem was the motherboard manufacturer.

The Model Name of the motherboard is Imperial, and the Model Number of the motherboard, could have been one of four variations offered.

Model Name: Imperial
Model numbers could be G, GL, GV, or GLVE
(Imperial G, Imperial GL, Imperial GV, or Imperial GLVE)

ALL four variations used the same Front Panel header.
(The connector on the motherboard the Front Panel wires connect to, is named the Front Panel header)

I would like you to view this page,

http://www.e4allupgraders.info/dir1/ecase/support/front_panel_header_support.shtml

Scroll down to the heading -
Trigem Imperial Front Panel Header Pinout.

A) Pins 1, 2, and 3 are for the Power On LED light.

B) Pins 5 and 6 are for the HarDDrive activity LED light.
(Pin 4 is not used. NC. No Connection)

C) Pins 7 and 8 are for the Power On switch

D) I wouldn't connect any wires to Pins 9 and 10, nor Pins 11 and 12

E) Pins 14 and 15 are for the Reset switch. (The button you press to restart your computer.
If the T2542 doesn't have a Reset switch, don't worry about it. There are many other ways to restart your computer)

F) Pins 17 18, and 20 are for an internal speaker.
This speaker is used for BIOS Beep Codes.

In the chart to the right, you will see GRD used many times.
GRD stands for Ground.
ANY Black wire in the twisted pair of wires, is a Ground wire.

Most of the eMachines I have worked on, use a Red, and Black pair of twisted wires for the Power On switch.
I could be mistaken on the T2542.

Best method, is to follow the color code of the wires that come from Pins 7 and 8, and be sure.

hello there:
Please read this carefully and follow the tips and this will help you find out what is exactly the problem ok
How to test many brands of Ranges that are flashing a F1 fault code: You have either a bad ERC (clock) or a bad touch pad.

1. Disconnect power to stove
2. Gain access to the back of the clock (electronic range control or ERC).
3. Unplug the touch pad ribbon connector from the ERC. This will be a flat wire approx. 1 1/2" to 2" wide.
4. Make sure everything is clear and will not short out when power is turned back on.
5. Turn power back on to stove.
6. Watch for the F1 and listen for the beep.
7. If you get the F1 and beep, replace the ERC.
8. If after approx. 30 minutes you do NOT get the F1 and hear the beep, replace the touch pad.
   NOTE: Some models incorporate the touch pad and the clock as one part. * We have seen a few of the newer Maytag ranges with a F1 fault code and the problem was the oven temp sensor, check carefully the wires to and from the oven temp sensor!!

In order for us to assess possible drivers that are available for the eMachines T-Series T2542, please download the trial of Driver Detective and run it to ensure a more accurate list of drivers for your computer with less chance of error.
http://www.drivershq.com/Drivers/eMachines/T-Series/T2542/22605/22647/22688/Drivers.aspx

Sounds like a video error. It may be caused also by a bad memory, but I suspect problems with video.

first battary problem change cmos either its cercuit of battry

its booting to bios screen

possible has no HDD configured/ or cable off

or stuck F1 key on keyboard

http://www.generalmanual.com/Telephones/Panasonic-KX-TD7896-W-Wireless-Telephone.htm
just click the link and download the manual.and follow the instructions.