How to identify bios chip tecra 9000

my tecra 9000 does not start. no POST .power comes on all led lights come on. no further action. i do not have schematic circuit diagram for the mother board. how do i identify the bios chip?

Here you can get the exact manual ....
http://www.eserviceinfo.com/index. [...] Tecra+9000
You'll be able to Identify it , it'll be mounted on a Jack, everything else on the mobo of the laptop will be soldered onto it, except the BIOS chip, it'll be mounted into a jack that will be soldered onto the board.

Right behind the PC Card Slot, there is a chip with a label pasted on it. That ought to be the Eprom. I have marked it in RED.

TMP87PM48U-datasheet
it is the ic shown in the position of the bios
the voltages reading in the board does not correspond to datasheet
the cmos battery lead does not reach there .
short of schematics of the mobo i am now tracing connections of 3v bat to the chip to make sure it is the chip we should look for.
there is a 5V coming in on pin 1
still more checking is to be done
will get back here soon



any thought on the schematic of this mobo or the chip connection details?

by the way i did not find a way to edit the image page so it need to show only the pin assignment of the chip

a X tal is connected across pin 1 and 2

seems it is being used as MCU mode
will check further how it is used as eprom

That is one difficult question... it's like water water everywhere and not a drop to drink.