Battery was VARTA - NI-MH. 3.6 V. When we picked up the m/cs they were idle for 4 years. Manuf date is 1999. M/c booted and worked and within a few days it stopped. Found battery leaked. Yes cleaned within a day or two. Removed chips so as not to have all residue going between pin and sockets which we could not see. Hot water clean and chk under good NIKON - found card is clean. Thought battery faulty and soon it happened on the other card also. No we find some chips busted , 10V +/- regulator gone, etc. Just wondering if there are some devices which will fail when battery liquid is on board and power on - with all V of 5 , 10 and 14 +/- which ones likely to fail. Or just change all. Thanks -----Original Message----- From: Brian Ellis [mailto:[log in to unmask]] Sent: Thursday, August 28, 2008 1:01 PM To: TechNet E-Mail Forum; Anil kher Subject: Re: [TN] what damage can a battery leakage do on a TTL/CMOS controller card 1990 vintage Nasty, but what kind of battery to start with? The chemistry of different types can vary enormously. Inge's advice is probably the safest and surest. Prevention is surely better than cure: never keep batteries in equipment longer than the "sell-by" date, whether used or not. If the cleaning is done rapidly after the leak occurs, it should be OK, but I would scrap anything that has had more than a week's contact with the battery residues. Why remove the chips? Brian Anil kher wrote: > Hi all > > > > Need advise. This has happenned twice in the last 2 months. The battery > leaked all over the card (S-M - CNC 45 card no. 45.01.02.3) The m/cs did not > start the next day. > > > > If the card is powered after a few years of storage the battery starts > leaking and within a few days it is all over the PCB. > > > > We removed the chips and cleaned in Hot water / air agitn and againa nd > again. Baked bare card and reloaded chips. NADA. Solvent extarct of bare PCB > all perfect. > > > > Advise if we should change all chips - some TTL, some cmos, memory, eproms, > etc. > > > > > > Anil > > > > Micro Interconnexion Pvt. Ltd > > D3-12 A, Corlim Ind. Estate > > Corlim, ILHAS, GOA > > INDIA - 403110 > > Tel: +91-832-2284337 > > Fax: +91-832-2284209 > > alt. E-mail: [log in to unmask] > > > > LEADERS IN GOLD PLATED PCBs > > > > > > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ----------------------------------------------------- > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------