T22 emits 4 beeps at POST

[SureFoot]

Hi i am a new Thinkpad owner
I just bought a used T22, along with a separate AC adapter and some working memory.
I plugged everything in, charged the battery, then upon power-up the T22 emits 4 short beeps at constant intervals, and the screen is still black.
Any idea ? Is it dead ?

[DaveO]

Try re-seating the RAM. If still no go, perhaps the RAM is not low density enough for the T22 which runs at 100mhz bus speed.
People will tell you its a PC100/PC133 thing, PC133 "usually" being high density 4 or 8 chip sticks, sometimes single sided,
but I had a T22 with 2 sticks of low density double sided (16chip) PC133 256mb Crucial memory and it worked no problems in the T22 and even an old 390X.

Check how many chips on the memory stick. If 8 or less, that may be the problem.

Hope this helps.

[SureFoot]

Hi and thanx for your answer.
All i have is a single stick of PC133 RAM, with 8 chips, double sided. It's brand new so i don't really suspect it could be faulty.
Also, if i remove the RAM altogether (empty RAM bay) and i try to boot, i get a SECOND beep sequence before the 4-beeps-in-a-row, quite similar to the RAM fault POST beep sequence on conventional PC's: one long beep, two short beeps...
and then , i still get my initial beep sequence: 4 short beeps, in a row (each at 1 second interval).

[JHEM]

All i have is a single stick of PC133 RAM, with 8 chips, double sided. It's brand new so i don't really suspect it could be faulty.

It's not that it's faulty, it's the fact that it's incompatible with the T22! You need PC100 lo-density memory for that unit, most PC133 memory won't work.

Also, if i remove the RAM altogether (empty RAM bay) and i try to boot, i get a SECOND beep sequence before the 4-beeps-in-a-row, quite similar to the RAM fault POST beep sequence on conventional PC's: one long beep, two short beeps

Because the T series laptops don't have any base memory installed, unlike some of the older Thinkpads such as the 600 series, removing all of the RAM will result in an unresponsive unit.

The error BEEPs you're hearing all relate to memory problems. Get the correct memory for the unit and try again.

Regards,

James

[SureFoot]

Thank you, i'll try that and keep you posted.

[AbsoluteRaleigh]

Thank you, i'll try that and keep you posted.

Yes- definately incompatible

[daeojkim]

The pattern of beep tells you what component of the hardware is in trouble. Either, momory, CPU, graphic controller, etc. But from what I read it sounds like bad or incompartible memory.

[AbsoluteRaleigh]

Hi and thanx for your answer.
All i have is a single stick of PC133 RAM, with 8 chips, double sided. It's brand new so i don't really suspect it could be faulty.
Also, if i remove the RAM altogether (empty RAM bay) and i try to boot, i get a SECOND beep sequence before the 4-beeps-in-a-row, quite similar to the RAM fault POST beep sequence on conventional PC's: one long beep, two short beeps...
and then , i still get my initial beep sequence: 4 short beeps, in a row (each at 1 second interval).

If you are installing a 256MB chip it must be PC100 (16 chip) memory.